CIRCLE STRETCH U.S. Marines perform stretching exercises after maneuvering an obstacle course in Taqaddum, Iraq, Oct. 30, 2008. The Marines are assigned to the 9th Engineer Support Battalion, 1st Naval Construction Regiment. The obstacle course is designed to help the Marines learn to work as a team while challenging them physically. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 642071-C-ZNQ34-542.jpg Photo Gallery