U.S. Marines with the 15th Marine Expeditionary Unit’s

U.S. Marines with the 15th Marine Expeditionary Unit’s Maritime Raid Force security element prepare to fast rope out of a CH-53E Super Stallion aboard Marine Corps Base Hawaii, May 12, 2015. Fast roping is an essential skill for the security element because it allows them to rapidly insert into an objective while avoiding potential ground obstacles or enemy forces. (U.S. Marine Corps photo by Cpl. Anna Albrecht/Released)