Freshman midshipmen, known as “plebes”, march during Sea Trials, a day of physical and mental challenges that caps off the freshman year at the U.S. Naval Academy in Annapolis, Md., Tuesday, May 13, 2014. (Photo by Patrick Semansky/AP Photo)

A member of the United States Naval Academy freshman class pushes a fake-gun through trenches at the wet and sandy station during the annual Sea Trials training exercise at the U.S. Naval Academy on May 13, 2014 in Annapolis, Maryland. For 14 hours, the United States Naval Academy freshman class, also known as Plebes, worked as a team to complete many grueling physical and mental challenges that help prepare them for real-world experiences and reinforce leadership, bonds, trust, and teamwork. Of the challenges, they endured: a two-mile regimental run, ground fights, water tactics, aquatics challenges, and survival skills, amongst many others. (Photo by Patrick Smith/Getty Images)

Members of the United States Naval Academy freshman crawl under one another at the wet and sandy station during the annual Sea Trials training exercise at the U.S. Naval Academy on May 13, 2014 in Annapolis, Maryland. (Photo by Patrick Smith/Getty Images)

A member of the United States Naval Academy freshman class shows his exhaustion at the wet and sandy station during the annual Sea Trials training exercise at the U.S. Naval Academy on May 13, 2014 in Annapolis, Maryland. (Photo by Patrick Smith/Getty Images)

Members of the United States Naval Academy freshman class do sit-ups at the wet and sandy station during the annual Sea Trials training exercise at the U.S. Naval Academy on May 13, 2014 in Annapolis, Maryland. (Photo by Patrick Smith/Getty Images)

Plebes race to the sand at the wet and sandy station during the annual Sea Trials training exercise. (Photo by Patrick Smith/Getty Images)

Phillip Metcalfe of Plano, Texas, screams as he lifts a log during Sea Trials, a day of physical and mental challenges for freshman midshipmen. (Photo by Patrick Semansky/Associated Press)

Members of the United States Naval Academy freshman class perform calisthenic exercise while wearing body-armour during the annual Sea Trials training exercise at the U.S. Naval Academy on May 13, 2014 in Annapolis, Maryland. (Photo by Patrick Smith/Getty Images)

Members of the United States Naval Academy freshman class ground fight during the annual Sea Trials training exercise at the U.S. Naval Academy on May 13, 2014 in Annapolis, Maryland. (Photo by Patrick Smith/Getty Images)

A member of the United States Naval Academy freshman class crawls through trenches at the wet and sandy station during the annual Sea Trials training exercise at the U.S. Naval Academy on May 13, 2014 in Annapolis, Maryland. (Photo by Patrick Smith/Getty Images)