A U.S. Soldier with the 20th Special Forces Group holds onto a CH-47 Chinook helicopter during helocast training, an airborne technique used by small forces to insert into a military area of operations, during Emerald Warrior 14 in Gulfport, Miss., April 30, 2014. Emerald Warrior is a U.S. Special Operations Command-sponsored two-week joint/combined tactical exercise designed to provide realistic military training in an urban setting. (U.S. Air Force photo by Senior Airman Jodi Martinez/Released)