A NATO "Boeing E-3A AWACS" airplane lands at a military airbase next to Henri Coanda international airport in Bucharest, Romania, on January 17, 2022. - NATO send surveillance aircraft to Romania to bolster its eastern flank and "monitor Russian military activity", the alliance said on Januaray 13, 2023. The Western military alliance has strengthened its presence in the region since Russia invaded Ukraine, which borders Romania, a NATO member. AWACS (Airborne Warning and Control System planes) can detect aircraft hundreds of kilometres away, making them a key capability for NATO's deterrence and defence posture. The planes arrive on January 17 in Otopeni, near Bucharest, and are part of a fleet of 14 NATO Boeing E-3A AWACS aircraft, usually based in Geilenkirchen, western Germany. (Photo by Daniel MIHAILESCU / AFP)

A NATO "Boeing E-3A AWACS" airplane lands at a military airbase next to Henri Coanda international airport in Bucharest, Romania, on January 17, 2022. - NATO send surveillance aircraft to Romania to bolster its eastern flank and "monitor Russian military activity", the alliance said on Januaray 13, 2023. The Western military alliance has strengthened its presence in the region since Russia invaded Ukraine, which borders Romania, a NATO member. AWACS (Airborne Warning and Control System planes) can detect aircraft hundreds of kilometres away, making them a key capability for NATO's deterrence and defence posture. The planes arrive on January 17 in Otopeni, near Bucharest, and are part of a fleet of 14 NATO Boeing E-3A AWACS aircraft, usually based in Geilenkirchen, western Germany. (Photo by Daniel MIHAILESCU / AFP)

A NATO "Boeing E-3A AWACS" airplane lands at a military airbase next to Henri Coanda international airport in Bucharest, Romania, on January 17, 2022. - NATO send surveillance aircraft to Romania to bolster its eastern flank and "monitor Russian military activity", the alliance said on Januaray 13, 2023. The Western military alliance has strengthened its presence in the region since Russia invaded Ukraine, which borders Romania, a NATO member. AWACS (Airborne Warning and Control System planes) can detect aircraft hundreds of kilometres away, making them a key capability for NATO's deterrence and defence posture. The planes arrive on January 17 in Otopeni, near Bucharest, and are part of a fleet of 14 NATO Boeing E-3A AWACS aircraft, usually based in Geilenkirchen, western Germany. (Photo by Daniel MIHAILESCU / AFP)

A NATO "Boeing E-3A AWACS" airplane lands at a military airbase next to Henri Coanda international airport in Bucharest, Romania, on January 17, 2022. - NATO send surveillance aircraft to Romania to bolster its eastern flank and "monitor Russian military activity", the alliance said on Januaray 13, 2023. The Western military alliance has strengthened its presence in the region since Russia invaded Ukraine, which borders Romania, a NATO member. AWACS (Airborne Warning and Control System planes) can detect aircraft hundreds of kilometres away, making them a key capability for NATO's deterrence and defence posture. The planes arrive on January 17 in Otopeni, near Bucharest, and are part of a fleet of 14 NATO Boeing E-3A AWACS aircraft, usually based in Geilenkirchen, western Germany. (Photo by Daniel MIHAILESCU / AFP)

A NATO "Boeing E-3A AWACS" airplane lands at a military airbase next to Henri Coanda international airport in Bucharest, Romania, on January 17, 2022. - NATO send surveillance aircraft to Romania to bolster its eastern flank and "monitor Russian military activity", the alliance said on Januaray 13, 2023. The Western military alliance has strengthened its presence in the region since Russia invaded Ukraine, which borders Romania, a NATO member. AWACS (Airborne Warning and Control System planes) can detect aircraft hundreds of kilometres away, making them a key capability for NATO's deterrence and defence posture. The planes arrive on January 17 in Otopeni, near Bucharest, and are part of a fleet of 14 NATO Boeing E-3A AWACS aircraft, usually based in Geilenkirchen, western Germany. (Photo by Daniel MIHAILESCU / AFP)

Military personnel descends from a NATO "Boeing E-3A AWACS" airplane after it landed on a military airbase next to Henri Coanda international airport in Bucharest, Romania, on January 17, 2022. - NATO send surveillance aircraft to Romania to bolster its eastern flank and "monitor Russian military activity", the alliance said on Januaray 13, 2023. The Western military alliance has strengthened its presence in the region since Russia invaded Ukraine, which borders Romania, a NATO member. AWACS (Airborne Warning and Control System planes) can detect aircraft hundreds of kilometres away, making them a key capability for NATO's deterrence and defence posture. The planes arrive on January 17 in Otopeni, near Bucharest, and are part of a fleet of 14 NATO Boeing E-3A AWACS aircraft, usually based in Geilenkirchen, western Germany. (Photo by Daniel MIHAILESCU / AFP)

A technician inspects the jet propellers of NATO "Boeing E-3A AWACS" airplane after it landed on a military airbase next to Henri Coanda international airport in Bucharest, Romania, on January 17, 2022. - NATO send surveillance aircraft to Romania to bolster its eastern flank and "monitor Russian military activity", the alliance said on Januaray 13, 2023. The Western military alliance has strengthened its presence in the region since Russia invaded Ukraine, which borders Romania, a NATO member. AWACS (Airborne Warning and Control System planes) can detect aircraft hundreds of kilometres away, making them a key capability for NATO's deterrence and defence posture. The planes arrive on January 17 in Otopeni, near Bucharest, and are part of a fleet of 14 NATO Boeing E-3A AWACS aircraft, usually based in Geilenkirchen, western Germany. (Photo by Daniel MIHAILESCU / AFP)

A NATO "Boeing E-3A AWACS" airplane is pictured after landing at a military airbase next to Henri Coanda international airport in Bucharest, Romania, on January 17, 2022. - NATO send surveillance aircraft to Romania to bolster its eastern flank and "monitor Russian military activity", the alliance said on Januaray 13, 2023. The Western military alliance has strengthened its presence in the region since Russia invaded Ukraine, which borders Romania, a NATO member. AWACS (Airborne Warning and Control System planes) can detect aircraft hundreds of kilometres away, making them a key capability for NATO's deterrence and defence posture. The planes arrive on January 17 in Otopeni, near Bucharest, and are part of a fleet of 14 NATO Boeing E-3A AWACS aircraft, usually based in Geilenkirchen, western Germany. (Photo by Daniel MIHAILESCU / AFP)

Technicians cover the jet propellers of NATO "Boeing E-3A AWACS" airplane after it landed at a military airbase next to Henri Coanda international airport in Bucharest, Romania, on January 17, 2022. - NATO send surveillance aircraft to Romania to bolster its eastern flank and "monitor Russian military activity", the alliance said on Januaray 13, 2023. The Western military alliance has strengthened its presence in the region since Russia invaded Ukraine, which borders Romania, a NATO member. AWACS (Airborne Warning and Control System planes) can detect aircraft hundreds of kilometres away, making them a key capability for NATO's deterrence and defence posture. The planes arrive on January 17 in Otopeni, near Bucharest, and are part of a fleet of 14 NATO Boeing E-3A AWACS aircraft, usually based in Geilenkirchen, western Germany. (Photo by Daniel MIHAILESCU / AFP)

A technician inspects the jet propellers of NATO "Boeing E-3A AWACS" airplane after it landed on a military airbase next to Henri Coanda international airport in Bucharest, Romania, on January 17, 2022. - NATO send surveillance aircraft to Romania to bolster its eastern flank and "monitor Russian military activity", the alliance said on Januaray 13, 2023. The Western military alliance has strengthened its presence in the region since Russia invaded Ukraine, which borders Romania, a NATO member. AWACS (Airborne Warning and Control System planes) can detect aircraft hundreds of kilometres away, making them a key capability for NATO's deterrence and defence posture. The planes arrive on January 17 in Otopeni, near Bucharest, and are part of a fleet of 14 NATO Boeing E-3A AWACS aircraft, usually based in Geilenkirchen, western Germany. (Photo by Daniel MIHAILESCU / AFP)

A technician covers the jet propellers of NATO "Boeing E-3A AWACS" airplane after it landed at a military airbase next to Henri Coanda international airport in Bucharest, Romania, on January 17, 2022. - NATO send surveillance aircraft to Romania to bolster its eastern flank and "monitor Russian military activity", the alliance said on Januaray 13, 2023. The Western military alliance has strengthened its presence in the region since Russia invaded Ukraine, which borders Romania, a NATO member. AWACS (Airborne Warning and Control System planes) can detect aircraft hundreds of kilometres away, making them a key capability for NATO's deterrence and defence posture. The planes arrive on January 17 in Otopeni, near Bucharest, and are part of a fleet of 14 NATO Boeing E-3A AWACS aircraft, usually based in Geilenkirchen, western Germany. (Photo by Daniel MIHAILESCU / AFP)