US Navy 100830-N-7948R-454 Operations Specialist 2nd Class Ernest Delacruz, left, and Cryptologic Technician (Technical) 1st Class Jared Pollack perform inverted push ups on the flight deck of the amphibious dock landing ship U
Autor: U.S. Navy photo by Mass Communication Specialist 2nd Class Michael RussellQuelle: commons.wikimedia.org