Sim's ship had picked up a small piece of flak, but it had done no damage.
Stan laid over and made a sweep, ducking in and out of the flak.
Over the estuary of the Rhine River Stan met his first flak.
I'll take you right down on top of them, and nuts to their flak fire.
We never worried about the flak much because we could normally avoid it.
The long missions with flak ...