MECHANIZED MOTION U.S. Marines provide security while an amphibious assault vehicle rushes to its objective during a simulated mechanized raid in Okinawa, Japan, March 23, 2010. The Marine Expiditionary Unit conducted a tactical offload consisting of a mechanized raid, boat raid, helicopter raid and a humanitarian assistance and disaster relief exercise. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 666408-Y-JXX19-139.jpg Photo Gallery