Relatives of Ukrainian soldiers who died in the battle for Mariupol hold their portraits during a gathering at Independence square to mark the anniversary of the surrender of Azovstal steel plant, in Kyiv, Ukraine, Saturday, May 20, 2023. (AP Photo/Evgeniy Maloletka)

Relatives of Ukrainian soldiers who died in the battle for Mariupol hold their portraits, during a gathering at Independence square to mark the anniversary of the surrender of Azovstal steel plant, Kyiv, Ukraine, Saturday, May 20, 2023. (AP Photo/Evgeniy Maloletka)

Construction workers restore the overpass in front of the Metallurgical Combine Azovstal, in Mariupol, in Russian-controlled Donetsk region, eastern Ukraine, Saturday, May 20, 2023. (AP Photo)

Wifes and relatives of captured Ukrainian Azov regement servicemen hold placards during a march called "We are waiting for the heroes of Mariupol" at the Independence Square in Kyiv on May 20, 2023 to mark first anniversary of the fall of Mariupol to Russian troops. Key developments in the battle for the strategic Ukrainian port of Mariupol where more than 1,700 Ukrainian fighters have surrendered to Russian forces after holding out for weeks inside a steelworks. Following Azovstal seige, advocacy groups say only about 500 of the Ukrainian fighters have been freed in exchanges – while the rest are cut off from families who have at times been left to wonder if they are even still alive. (Photo by Sergei SUPINSKY / AFP)

Wifes and relatives of captured Ukrainian Azov regement servicemen hold placards during a march called "We are waiting for the heroes of Mariupol" at the Independence Square in Kyiv on May 20, 2023 to mark first anniversary of the fall of Mariupol to Russian troops. Key developments in the battle for the strategic Ukrainian port of Mariupol where more than 1,700 Ukrainian fighters have surrendered to Russian forces after holding out for weeks inside a steelworks. Following Azovstal seige, advocacy groups say only about 500 of the Ukrainian fighters have been freed in exchanges – while the rest are cut off from families who have at times been left to wonder if they are even still alive. (Photo by Sergei SUPINSKY / AFP)

Wifes and relatives of captured Ukrainian Azov regement servicemen hold placards during a march called "We are waiting for the heroes of Mariupol" at the Independence Square in Kyiv on May 20, 2023 to mark first anniversary of the fall of Mariupol to Russian troops. Key developments in the battle for the strategic Ukrainian port of Mariupol where more than 1,700 Ukrainian fighters have surrendered to Russian forces after holding out for weeks inside a steelworks. Following Azovstal seige, advocacy groups say only about 500 of the Ukrainian fighters have been freed in exchanges – while the rest are cut off from families who have at times been left to wonder if they are even still alive. (Photo by Sergei SUPINSKY / AFP)

Wifes and relatives of captured Ukrainian Azov regement servicemen hold placards during a march called "We are waiting for the heroes of Mariupol" at the Independence Square in Kyiv on May 20, 2023 to mark first anniversary of the fall of Mariupol to Russian troops. Key developments in the battle for the strategic Ukrainian port of Mariupol where more than 1,700 Ukrainian fighters have surrendered to Russian forces after holding out for weeks inside a steelworks. Following Azovstal seige, advocacy groups say only about 500 of the Ukrainian fighters have been freed in exchanges – while the rest are cut off from families who have at times been left to wonder if they are even still alive. (Photo by Sergei SUPINSKY / AFP)

Wifes and relatives of captured Ukrainian Azov regement servicemen hold their portraits during a march called "We are waiting for the heroes of Mariupol" at the Independence Square in Kyiv on May 20, 2023 to mark first anniversary of the fall of Mariupol to Russian troops. Key developments in the battle for the strategic Ukrainian port of Mariupol where more than 1,700 Ukrainian fighters have surrendered to Russian forces after holding out for weeks inside a steelworks. Following Azovstal seige, advocacy groups say only about 500 of the Ukrainian fighters have been freed in exchanges – while the rest are cut off from families who have at times been left to wonder if they are even still alive. (Photo by Sergei SUPINSKY / AFP)

Wifes and relatives of captured Ukrainian Azov regement servicemen hold their portraits during a march called "We are waiting for the heroes of Mariupol" at the Independence Square in Kyiv on May 20, 2023 to mark first anniversary of the fall of Mariupol to Russian troops. Key developments in the battle for the strategic Ukrainian port of Mariupol where more than 1,700 Ukrainian fighters have surrendered to Russian forces after holding out for weeks inside a steelworks. Following Azovstal seige, advocacy groups say only about 500 of the Ukrainian fighters have been freed in exchanges – while the rest are cut off from families who have at times been left to wonder if they are even still alive. (Photo by Sergei SUPINSKY / AFP)

Wifes and relatives of captured Ukrainian Azov regement servicemen hold their portraits during a march called "We are waiting for the heroes of Mariupol" at the Independence Square in Kyiv on May 20, 2023 to mark first anniversary of the fall of Mariupol to Russian troops. Key developments in the battle for the strategic Ukrainian port of Mariupol where more than 1,700 Ukrainian fighters have surrendered to Russian forces after holding out for weeks inside a steelworks. Following Azovstal seige, advocacy groups say only about 500 of the Ukrainian fighters have been freed in exchanges – while the rest are cut off from families who have at times been left to wonder if they are even still alive. (Photo by Sergei SUPINSKY / AFP)

Wifes and relatives of captured Ukrainian Azov regement servicemen hold their portraits during a march called "We are waiting for the heroes of Mariupol" at the Independence Square in Kyiv on May 20, 2023 to mark first anniversary of the fall of Mariupol to Russian troops. Key developments in the battle for the strategic Ukrainian port of Mariupol where more than 1,700 Ukrainian fighters have surrendered to Russian forces after holding out for weeks inside a steelworks. Following Azovstal seige, advocacy groups say only about 500 of the Ukrainian fighters have been freed in exchanges – while the rest are cut off from families who have at times been left to wonder if they are even still alive. (Photo by Sergei SUPINSKY / AFP)

Wifes and relatives of captured Ukrainian Azov regement servicemen hold their portraits during a march called "We are waiting for the heroes of Mariupol" at the Independence Square in Kyiv on May 20, 2023 to mark first anniversary of the fall of Mariupol to Russian troops. Key developments in the battle for the strategic Ukrainian port of Mariupol where more than 1,700 Ukrainian fighters have surrendered to Russian forces after holding out for weeks inside a steelworks. Following Azovstal seige, advocacy groups say only about 500 of the Ukrainian fighters have been freed in exchanges – while the rest are cut off from families who have at times been left to wonder if they are even still alive. (Photo by Sergei SUPINSKY / AFP)

Wifes and relatives of captured Ukrainian Azov regement servicemen hold their portraits during a march called "We are waiting for the heroes of Mariupol" at the Independence Square in Kyiv on May 20, 2023 to mark first anniversary of the fall of Mariupol to Russian troops. Key developments in the battle for the strategic Ukrainian port of Mariupol where more than 1,700 Ukrainian fighters have surrendered to Russian forces after holding out for weeks inside a steelworks. Following Azovstal seige, advocacy groups say only about 500 of the Ukrainian fighters have been freed in exchanges – while the rest are cut off from families who have at times been left to wonder if they are even still alive. (Photo by Sergei SUPINSKY / AFP)

A relative of captured Ukrainian Azov regiment servicemen holds a portrait during a march called "We are waiting for the heroes of Mariupol" at the Independence Square in Kyiv on May 20, 2023 to mark first anniversary of the fall of Mariupol to Russian troops. Key developments in the battle for the strategic Ukrainian port of Mariupol where more than 1,700 Ukrainian fighters have surrendered to Russian forces after holding out for weeks inside a steelworks. Following Azovstal seige, advocacy groups say only about 500 of the Ukrainian fighters have been freed in exchanges – while the rest are cut off from families who have at times been left to wonder if they are even still alive. (Photo by Sergei SUPINSKY / AFP)

A relative of captured Ukrainian Azov regiment servicemen holds a portrait during a march called "We are waiting for the heroes of Mariupol" at the Independence Square in Kyiv on May 20, 2023 to mark first anniversary of the fall of Mariupol to Russian troops. Key developments in the battle for the strategic Ukrainian port of Mariupol where more than 1,700 Ukrainian fighters have surrendered to Russian forces after holding out for weeks inside a steelworks. Following Azovstal seige, advocacy groups say only about 500 of the Ukrainian fighters have been freed in exchanges – while the rest are cut off from families who have at times been left to wonder if they are even still alive. (Photo by Sergei SUPINSKY / AFP)

Wifes and relatives of captured Ukrainian Azov regiment servicemen hold their portraits during a march called "We are waiting for the heroes of Mariupol" at the Independence Square in Kyiv on May 20, 2023 to mark first anniversary of the fall of Mariupol to Russian troops. Key developments in the battle for the strategic Ukrainian port of Mariupol where more than 1,700 Ukrainian fighters have surrendered to Russian forces after holding out for weeks inside a steelworks. Following Azovstal seige, advocacy groups say only about 500 of the Ukrainian fighters have been freed in exchanges – while the rest are cut off from families who have at times been left to wonder if they are even still alive. (Photo by Sergei SUPINSKY / AFP)

Wifes and relatives of captured Ukrainian Azov regiment servicemen hold their portraits during a march called "We are waiting for the heroes of Mariupol" at the Independence Square in Kyiv on May 20, 2023 to mark first anniversary of the fall of Mariupol to Russian troops. Key developments in the battle for the strategic Ukrainian port of Mariupol where more than 1,700 Ukrainian fighters have surrendered to Russian forces after holding out for weeks inside a steelworks. Following Azovstal seige, advocacy groups say only about 500 of the Ukrainian fighters have been freed in exchanges – while the rest are cut off from families who have at times been left to wonder if they are even still alive. (Photo by Sergei SUPINSKY / AFP)

Wifes and relatives of captured Ukrainian Azov regiment servicemen attend a march called "We are waiting for the heroes of Mariupol" at the Independence Square in Kyiv on May 20, 2023 to mark first anniversary of the fall of Mariupol to Russian troops. Key developments in the battle for the strategic Ukrainian port of Mariupol where more than 1,700 Ukrainian fighters have surrendered to Russian forces after holding out for weeks inside a steelworks. Following Azovstal seige, advocacy groups say only about 500 of the Ukrainian fighters have been freed in exchanges – while the rest are cut off from families who have at times been left to wonder if they are even still alive. (Photo by Sergei SUPINSKY / AFP)

A woman holds a portrait of captured Ukrainian Azov regiment serviceman during a march called "We are waiting for the heroes of Mariupol" at the Independence Square in Kyiv on May 20, 2023 to mark first anniversary of the fall of Mariupol to Russian troops. Key developments in the battle for the strategic Ukrainian port of Mariupol where more than 1,700 Ukrainian fighters have surrendered to Russian forces after holding out for weeks inside a steelworks. Following Azovstal seige, advocacy groups say only about 500 of the Ukrainian fighters have been freed in exchanges – while the rest are cut off from families who have at times been left to wonder if they are even still alive. (Photo by Sergei SUPINSKY / AFP)

A woman removes a cover to reveal an installation - a symbol of perseverence and faith for Ukrainian prisoners of war from Azovstal - during its inauguration at Sophia Square in Kyiv on May 20, 2023, to mark first anniversary of the fall of Mariupol to Russian troops. A horrific battle for Mariupol came down to Ukrainian troops and civilians holding out beneath the Azovstal steelworks, but that ended with Kyiv's order for them to surrender to save their lives. Russia said it had taken captive 2,439 men and women fighters by the May 20, 2022 fall of the bombed works, which was equipped with bunkers and tunnels that had sheltered the holdouts. (Photo by Sergei SUPINSKY / AFP)

People attend the inauguration of an installation - a symbol of perseverence and faith for Ukrainian prisoners of war from Azovstal - at Sophia Square in Kyiv on May 20, 2023, to mark first anniversary of the fall of Mariupol to Russian troops. A horrific battle for Mariupol came down to Ukrainian troops and civilians holding out beneath the Azovstal steelworks, but that ended with Kyiv's order for them to surrender to save their lives. Russia said it had taken captive 2,439 men and women fighters by the May 20, 2022 fall of the bombed works, which was equipped with bunkers and tunnels that had sheltered the holdouts. (Photo by Sergei SUPINSKY / AFP)

People attend the inauguration of an installation - a symbol of perseverence and faith for Ukrainian prisoners of war from Azovstal - at Sophia Square in Kyiv on May 20, 2023, to mark first anniversary of the fall of Mariupol to Russian troops. A horrific battle for Mariupol came down to Ukrainian troops and civilians holding out beneath the Azovstal steelworks, but that ended with Kyiv's order for them to surrender to save their lives. Russia said it had taken captive 2,439 men and women fighters by the May 20, 2022 fall of the bombed works, which was equipped with bunkers and tunnels that had sheltered the holdouts. (Photo by Sergei SUPINSKY / AFP)

An officer of Azov regement, former POW, speaks at the instalation-symbol of perseverence and faith of Ukrainian prisoners of war from Azovstal during the opening ceremony at Sophia Square in Kyiv on May 20, 2023 to mark first anniversary of the fall of Mariupol to Russian troops. A horrific battle for Mariupol came down to Ukrainian troops and civilians holding out beneath the Azovstal steelworks, but that ended with Kyiv's order for them to surrender to save their lives. Russia said it had taken captive 2,439 men and women fighters by the May 20, 2022 fall of the bombed works, which was equipped with bunkers and tunnels that had sheltered the holdouts. (Photo by Sergei SUPINSKY / AFP)

A Ukrainian officer of the Azov regiment, former prisoner of war, attends the inauguration of an installation - a symbol of perseverence and faith for Ukrainian prisoners of war from Azovstal - at Sophia Square in Kyiv on May 20, 2023, to mark first anniversary of the fall of Mariupol to Russian troops. A horrific battle for Mariupol came down to Ukrainian troops and civilians holding out beneath the Azovstal steelworks, but that ended with Kyiv's order for them to surrender to save their lives. Russia said it had taken captive 2,439 men and women fighters by the May 20, 2022 fall of the bombed works, which was equipped with bunkers and tunnels that had sheltered the holdouts. (Photo by Sergei SUPINSKY / AFP)