By shooting down a MiG-21, Col. Robin Olds becomes the first and only USAF ace with victories in both World War II and Vietnam. Flying with Olds in the backseat of the McDonnell Douglas F- 4C is 1st. Lt. Charles Clifton.
The U.S. sent Air Force F-16s over central Syria in a show of force following the Dec. 13 killing of two U.S. Army Soldiers and one American civilian interpreter by a gunman linked to the Islamic State group.

