Navy SEALs Training

CORONADO, CA - APRIL 15: During a Hell Week surf drill evolution, a Navy SEAL instructor assists students from Basic Underwater Demolition/SEAL (BUD/S) class 245 with learning the importance of listening April 15, 2003 in Coronado, California. The intense physical and mental conditioning it takes to become a SEAL begins at BUD/S training. During this six-month mind and body obstacle course, recruits are pushed to their physical and mental limits. Further development of the core values, Honor, Courage, Commitment and Integrity, is an essential component of SEAL training and one that is weaved throughout a SEAL's career. First phase is the basic conditioning phase and is eight weeks in length. Physical training involves running, swimming, and calisthenics, all of which become increasingly difficult as the weeks progress. The fourth week of training, "Hell Week," is five-and-a-half days of continuous training with very little sleep. This week is designed to push students to their maximum capability both physically and mentally. The remaining weeks are spent in hydrographic reconnaissance and basic maritime training. (Photo by Photographer's Mate 2nd Class Eric S. Logsdon/U.S. Navy via Getty Images)