A U.S. Navy Basic Underwater Demolition/SEAL (BUD/S) candidate waves a flare during a simulated dive casualty drill while training at Naval Amphibious Base Coronado, Calif., April 26, 2012.
Dive training is the second phase candidates participate in during BUD/S. The Navy SEALs are the maritime component of special operations forces and are trained to conduct a variety of operations from the sea, air and land.(DoD photo by Mass Communication Specialist 2nd Class Dominique M. Canales, U.S. Navy /Released). Original public domain image from Flickr