A TEST OF STRENGTH U.S. Marine Corps Pvt. Santos Pelayo Jr., struggles as he conducts strenuous trunk raises – an exercise where an individual suspends his body using only his arms and feet - at Marine Corps Recruit Depot San Diego, Oct. 26, 2006. SHARE: Download: Full Size (0.08 MB) Credit: VIRIN: 838314-Q-GAV71-538.jpg Photo Gallery