But Pentagon Press Secretary John Kirby told CNN Tuesday he wasn't "overly concerned about these images" of Taliban fighters examining the abandoned aircraft.
"They can inspect all they want," Kirby said. "They can look at them, they can walk around -- but they can't fly them. They can't operate them."
He added that the US military had made "unusable all the gear that is at the airport -- all the aircraft, all the ground vehicles.
"The only thing that we left operable is a couple of fire trucks and some fork lifts, so that the airport itself can remain more operational going forward," he said.
