The first C-5 Galaxy to be retired arrives at the Aerospace Maintenance and Regeneration Center (the Boneyard) at Davis-Monthan AFB, Ariz.
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.

