So Combat Outpost Keating was a collection of buildings of concrete and plywood with trenches and sandbags.

WHITEHOUSE: The White House

Eight U.S. troops were killed at Combat Outpost Keating, and the camp was overrun by the Taliban.

CNN: Clint Romesha, the bravest of the brave

Shaffer's unit at Combat Outpost Pennsylvania in Afghanistan 3rd Platoon, Bravo Company, 1st Battalion, 8th Marine Regiment half are 22 years old or younger.

WSJ: When the Troops Were Very Young