F-22 Raptors participate in a Red Flag exercise at Nellis AFB, Nev., for the first time. The 94th Fighter Squadron at Langley AFB, Va., deployed 14 Raptors and 197 airmen for the exercise.
The U.S. began extensive air and artillery strikes against Islamic State group targets in Syria on Dec. 19 in retaliation for the killing of three Americans on Dec. 13 by a gunman affiliated with ISIS, U.S. officials said.

