NASA’s experimental X-43A Hyper X hypersonic research vehicle shatters the speed record for an air-breathing vehicle when it flies to nearly 10 times the speed of sound. Flying from Edwards AFB, Calif., NASA’s B-52B mothership transports the X-43A to a launch location off the Pacific coast.
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.

