The Lockheed/Boeing/General Dynamics YF-22 prototype is flown to an unprecedented 60-degree angle-of-attack (AOA) attitude and remains in full control in a test flight over Edwards AFB, Calif.
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.
