USAF launches its final Titan II booster from Vandenberg AFB, Calif. It was the 13th of 14 Titan II ICBMs refurbished for launch duty.
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.
