An unusual announcement about a US Navy submarine packed with cruise missiles is a loud message that puts Iran on notice

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A US Navy submarine sails in the middle of a dark blue ocean with a US warship in the background.
Submarine USS Georgia in the Strait of Hormuz with the cruiser USS Philippine Sea.

US Navy courtesy photo

A US Navy carrier strike group equipped with F-35 stealth fighters is rushing to the Middle East along with a submarine packed with Tomahawk missiles

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A large ship at sea on the right and a smaller ship in the background on the left.
The aircraft carrier USS Abraham Lincoln, right, follows the guided missile cruiser USS Cape St. George as the ships transit the Strait of Hormuz on May 1, 2012.

US Navy photo by Mass Communication Specialist 3rd Class Alex R. Forst

Navy SEALs dropped in on a nuclear-powered submarine in the Pacific, drilling for a higher-end fight

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Navy SEALs climb aboard a US Navy submarine.
West Coast-based Naval Special Warfare (NSW) operators conduct military dive operations and prepare to board the Los Angeles-class fast-attack submarine USS Greeneville (SSN 772).

Petty Officer 1st Class Alex Smedegard

Chinese scientists claim Star Wars-like laser submarines can blast US satellites

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Chinese researchers believe submarines could be a key weapon against an adversary's satellite network.
Chinese researchers believe submarines could be a key weapon against an adversary's satellite network.

Reuters

Eyeing China, the Philippines wants to buy its first attack submarine

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The Philippines are interested in buying a diesel-electric submarine to defend their sovereignty.
The Philippines are interested in buying a diesel-electric submarine to defend their sovereignty.

Yasuyoshi Chiba/Getty Images

A NATO sub hunter captured these shots of a Russian submarine in waters newly surrounded by the alliance

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A Russian submarine surfaces in the blue water of the Baltic Sea.
A Russian submarine photographed by a NATO P-3 maritime patrol aircraft while sailing in the Baltic Sea.

NATO Maritime Command

China is developing systems to hunt US submarines from the air

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China's navy wants aircrews to play a larger role in hunting enemy submarines.
China's navy wants aircrews to play a larger role in hunting enemy submarines.

Li Hao/Getty Images

How the US Navy's Virginia-class attack submarine gives the US an edge in global undersea superiority

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The attack submarine USS Virginia
The attack submarine USS Virginia departs Naval Submarine Base New London en route to Portsmouth Naval Shipyard in Kittery, Maine.

US Navy photo/Petty Officer 1st Class Steven Myers

'Unsafe' intercepts of Australian anti-submarine aircraft by Chinese fighter jets hint at what they may be guarding so aggressively, naval expert says

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An MH-60R Sea Hawk helicopter from the Royal Australian Navy Anzac-class frigate HMAS Ballarat (FFH 155) prepares to land on the flight deck aboard the Arleigh Burke-class guided-missile destroyer USS John S.

China's submarine force is stressed by their more realistic training for combat

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Chinese sailors at a demonstration at China's Submarine Academy in Qingdao.
Chinese sailors at a demonstration at China's Submarine Academy in Qingdao.

Kevin Frayer/Getty Images

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