© Brendan Hoffman for The New York Times Andriy, a Ukrainian Air Force pilot.“Every time when I fly, it’s for a real fight,” he said. The Ukrainian Air Force is operating in near total secrecy. If Ukraine’s air defenses fail, Russian jets could easily pick them off. A volunteer network watches and listens for Russian jets, calling in coordinates and estimated speed and altitude. He has shot down Russian jets but was not permitted to say how many, or of which type.
