The Air Force formally assumes control of the Naval Space Surveillance System, commonly called the Navy Fence, with operations based at Dahlgren, Va. Now the Air Force Fence, it is a series of nine antenna sites across the southern US that help provide space situational awareness.
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.
