NECK AND NECK U.S. Marine Corps Lance Corporals Zachary H. Lama, right, and Shawn R. Litchfield, both competitors in a super physical fitness test, are neck and neck at a double-bar obstacle on Marine Corps Air Station Iwakuni, Japan, June 17, 2009. The course was designed with no rest in between events, challenging the Marines physical and mental stamina for a chance to ride in the back seat of an F/A-18 fighter jet. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 069554-W-THR52-312.jpg Photo Gallery