LAVA VIPER U.S. Marine Corps Pfc. Matthew Bollig, front, and Pfc. Ryan Kelly, fire an 83 mm high explosive dual-purpose rocket from a shoulder-fired multipurpose assault weapon in a paired volley fire at the Infantry Platoon Battle Course, Range 10, in the Pohakuloa Training Area, Hawaii, July 20, 2013. The mock attack was part of Exercise Lava Viper, a battalion-level combined-arms exercise designed to enhance the abilities of ground combat and support element Marines. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 739326-K-AZY93-436.jpg Photo Gallery