USAF deploys the RQ-4 Global Hawk unmanned aerial vehicle to participate in Southwest Asia operations. By Feb. 10, 2010, the UAV had flown 1,500 combat sorties.
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.
