Air Force Global Strike Command activates the 69th Bomb Squadron at Minot AFB, N.D., where it will serve as USAF’s fourth operational B-52H squadron.
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.

