A U.S. Army soldier assigned to the 187th Infantry Regiment guards against hostiles from behind a machine gun as other soldiers take flight in a CH-47 Chinook helicopter in support of Operation Swarmer. The CH-47 is a twin-engine, tandem rotor helicopter designed for transportation of cargo, troops and weapons during day, night, visual and instrument conditions. U.S. Navy photo by Photographer`s Mate 3rd class Shawn Hussong