U.S. Marines participate in a fast rope exercise. U.S. Marines with the 31st Marine Expeditionary Unit participate in a fast rope exercise moving out the back of a CH-46E Sea Knight helicopter and onto the flight deck of the USS Essex (LHD 2) on May 18, 2008. SHARE: Download: Full Size (0.03 MB) Credit: VIRIN: 639359-D-RZS45-656.jpg Photo Gallery