We got an inside look at what United States Army infantry trainees go through during their first day of basic training at the Maneuver Center of Excellence in Fort Benning, Georgia. For decades, trainees were indoctrinated on day one with an unofficial tradition known as the "shark attack," during which they were verbally berated by drill sergeants in a manner subsequently described by Army officials as "degrading."br In the fall of 2020, the shark attack was officially replaced with an event called the "first 100 yards," which incorporates teamwork into a competition that features mental and physical challenges. According to the Army, the shark attack was a tradition born during the Vietnam era, when soldiers were drafted to serve. After determining that it did not speak to the all-volunteer force that constitutes today's Army, Fort Benning leadership designed the new event.br Chief video correspondent Graham Flanagan followed trainees in the the all-male Delta Company of the 1st Battalion, 50th Infantry Regiment during the first 100 yards. Divided into four platoons, the trainees competed for a reward in four separate events that forced them to work together in a stressful environment.