NASA's Great Observatory View of the Crab Nebula
HD wallpaper: USS Monterey, CG-61, guided-missile cruiser, USA
File:US Navy 040706-N-4953E-001 The Ticonderoga-class guided
File:US Navy 101119-N-6266K-023 A demolition charge detonates
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File:US Navy 030209-N-5319A-004 Seabees from Naval Mobile