KETTLEBELL TRAINING Navy Petty Officer 3rd Class Paul Osis performs underwater kettlebell walks to increase lung power and endurance at Scott Pool on Joint Base Pearl Harbor-Hickam, Hawaii, Feb. 27, 2014. Osis is a search and rescue swimmer assigned to the USS O'Kane. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 997175-U-RVD42-739.jpg Photo Gallery