The sailors were said to have disappeared into the water after a vessel boarding attempt. Pentagon officials said the episode was not related to recent clashes with the Houthi militia in Yemen.
For the first time, everyone in Naval Special Warfare, not just trainees, will face random screening for performance-enhancing drugs, believed to be widely abused in the ranks.
Overzealous instructors, unchecked drug use, and inadequate leadership and medical oversight turned a tough selection course into a dangerous ordeal, investigators found.