Stryker Patrol .S. Air Force Senior Airman Chris Pierce, a joint tactical air controller assigned to the U.S. Army's 4th Battalion, 23rd Infantry Regiment, 172nd Stryker Brigade Combat Team, provides rear security in a Stryker vehicle while on patrol near Sinjar, Iraq, May 14, 2006. SHARE IMAGE: Download Image: Full Size (0.08 MB) Photo By: VIRIN: 959954-G-ELR76-689.jpg Photo Gallery