Members from Maritime Safety and Security Team Honolulu practice entering and clearing spaces during Tactical Sustainment Training at a shoot house at Schofield Barracks, April 15, 2015. MSST units are versatile, capable of performing any of the Coast Guard’s 11 statutory missions, but are most commonly associated with ports, waterways and coastal security as well as other homeland security roles. (U.S. Coast Guard photo by Petty Officer 3rd Class Melissa E. McKenzie)