Air Force Space Command opens its new Standard Space Trainer Integrated Space Center at Schriever AFB, Colo., where it has been under development since 2006. The SST offers common training architecture for satellite operators.
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.
