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. 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 (1.28 MB) Tags: photo essays, week in photos, week in photos Credit: VIRIN: 911945-I-DME50-375.jpg Photo Gallery