Lance Cpl. David M. Hammell uses a jackhammer to drive a stake. Lance Cpl. David M. Hammell uses a jackhammer to drive one of the stakes that anchors a portable M-31 arresting gear system on a runway in Udon Thani, Thailand, on April 27, 2005. Hammell is attached to the 1st Marine Aircraft Wing, Marine Wing Support Squadron 171, Expeditionary Air Field Services, who are installing the bi-directional, portable arresting gear system as part of Exercise Cobra Gold 2005. The braking system and its a 190-ft. wire cable is designed to bring an aircraft landing at a speed of 150 mph to a complete stop. SHARE: Download: Full Size (0.03 MB) Credit: VIRIN: 954233-X-UEQ56-792.jpg Photo Gallery