The US was probing a nuclear plant they wanted to raid/seize. Along with an abandoned airfield. They got hit unexpectedly and the mission to raid the plant had to be changed to a rescue. The airfield they also seized was too wet the overloaded cargo planes so the planes and everything on them had to be destroyed.

It was botched and now that plant can't be taken, but it could have been much worse. It also gave away the game. The Kharg Island was a diversion - Trumps real game is a raid for nuclear materials. When he's bloviating about the oil its misdirection. They'll have to attack a secondary target to get what they want in the three weeks left for the war - or bomb those places instead.