A U.S. Navy Basic Underwater Demolition/SEAL (BUD/S) student participates in interval swim training in San Diego Bay Aug. 2, 2012.
The swim is part of the basic orientation portion of the BUD/S training pipeline. Navy SEALs are the maritime component of U.S. 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 Trevor Welsh, U.S. Navy) Original public domain image from Flickr