An instructor at the US Army's Jungle Operations Training Course breaks down every piece a jungle soldier would carry in a "72-hour bag" including weapons, survival tools, and field rations. Sergeant Brett Bostick explains why each item is integral to the mission of the jungle soldier who must battle treacherous conditions in a challenging environment where the terrain can be just as deadly as the enemy. The US Army trains soldiers for jungle warfare at Lightning Academy on the island of Oahu in Hawaii.