U.S. Marine Corps Lance Cpl. Steven J. Zandstra provides security at a checkpoint in Sangin, Helmand province, Afghanistan, on Nov. 1, 2010. Zandstra is assigned to Police Advisor Team 1, 3rd Battalion, 5th Marine Regiment, Regimental Combat Team 2, whose mission is to conduct counterinsurgency operations in partnership with the International Security Assistance Force.