Nigeria, Nov. 19 -- Jonathan Scott (real name withheld) had worked on the front lines in Ukraine since the start of the war, helping wounded soldiers and providing aid to civilians. Then on 30 January, a drone attacked his crew, and in a split second, he went from being a caregiver to becoming a patient himself.

Mr Scott recalled the hours leading up to the attack. He had gone around Pokrovsk, a city in Donetsk, eastern Ukraine, that morning in search of people trapped in their homes, fearing possible drone strikes from Russia, and those already injured who needed medical attention. The city was one of the areas in Ukraine heavily targeted by the Russian military.

That morning, Mr Scott and other members of the crew had rescued eight Uk...