U.S. Army Sgt. Roberto Carrero, 2nd Battalion, 508th Parachute Infantry Regiment gives a Chinook helicopter instruction on supply drop location at Combat Outpost Sarkari Bagh, Arghandab River Valley, Afghanistan, Jan. 9.

U.S. Soldiers from 2nd Battalion, 508th Parachute Infantry Regiment train Afghan National Police officers on building entering procedures at Combat Outpost Sarkari Bagh, Arghandab River Valley, Afghanistan, Jan. 9.