First Lady of Ukraine Olena Zelenska is pictured during a minute of silence at the World Economic Forum in Davos, Switzerland, for the victims of a helicopter crash in Ukraine, where Minister of Internal Affairs Denys Monastyrsky died among others on Wednesday, Jan. 18, 2023. The annual meeting of the World Economic Forum is taking place in Davos from Jan. 16 until Jan. 20, 2023. (AP Photo/Markus Schreiber)

President Volodymyr Zelenskyy of Ukraine is seen on a video screen, holding a minute of silence at the World Economic Forum in Davos, Switzerland, for the victims of a helicopter crash in Ukraine, where Minister of Internal Affairs Denys Monastyrsky died among others on Wednesday, Jan. 18, 2023. The annual meeting of the World Economic Forum is taking place in Davos from Jan. 16 until Jan. 20, 2023. (AP Photo/Markus Schreiber)

President Volodymyr Zelenskyy of Ukraine is seen on a video screen, holding a minute of silence with participants at the World Economic Forum in Davos, Switzerland, for the victims of a helicopter crash in Ukraine, where Minister of Internal Affairs Denys Monastyrsky died among others on Wednesday, Jan. 18, 2023. The annual meeting of the World Economic Forum is taking place in Davos from Jan. 16 until Jan. 20, 2023. (AP Photo/Markus Schreiber)

President Volodymyr Zelenskyy of Ukraine is seen on a video screen, holding a minute of silence with participants at the World Economic Forum in Davos, Switzerland, for the victims of a helicopter crash in Ukraine, where Minister of Internal Affairs Denys Monastyrsky died among others on Wednesday, Jan. 18, 2023. The annual meeting of the World Economic Forum is taking place in Davos from Jan. 16 until Jan. 20, 2023. (AP Photo/Markus Schreiber)

Ukraine's First Lady Olena Zelenska (2nd L) Kyiv mayor Vitali Klitschko (3rd R) and Ukrainian former professional boxer Wladimir Klitschko (2nd R) observe a moment of silence after the reported death of Ukraine's interior minister as they attend a special dialogue with CEO's meeting at the Congress centre during the World Economic Forum (WEF) annual meeting in Davos, on January 18, 2023. - Sixteen people, including two children and Ukraine's interior minister, were killed when a helicopter crashed near a kindergarten outside the capital Kyiv, officials said on January 18, 2023. (Photo by Fabrice COFFRINI / AFP)