We got an inside look at how United States Marine Corps recruits are trained to rappel down a 47-foot-tall tower. Senior video correspondent Graham Flanagan spent five days at the Marine Corps Recruit Depot in Parris Island, SC, where he observed recruits at various stages of boot camp. Recruits learn two different types of rappelling techniques: fast-roping and static rappel. According to the depot, the training is designed to instill confidence, and introduce recruits to environments they may encounter while serving in the Corps.