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Four US Navy aircraft carriers sail in the Atlantic Ocean with a cloudy sky above them.
The Nimitz-class aircraft carriers USS Dwight D. Eisenhower, USS Harry S. Truman, and USS Gerald R. Ford and dry cargo ship USNS William McLean sail in formation in the Atlantic Ocean.
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A large Chinese ship sailing towards a much smaller ship
China has the world's largest coast guard fleet, and new acquisitions mean its strength has been significantly boosted.
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An aerial drone photo taken on May 17 shows the China Coast Guard CCG 3502 fleet conducting formation training in waters adjacent to China's Huangyan Dao.
China's Coast Guard has been ramping up its acquisition of bigger and bolder vessels, and word of a new "mothership" is fueling speculation it could be an aircraft or drone carrier.
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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.
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The solar panels charge the drone's rechargeable batteries and thrusters.
The Triton's solar panels charge the drone's rechargeable batteries and thrusters.
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An engineer shines a light on a Mako hypersonic missile model featuring the Lockheed Martin logo.
An engineer shines a light on a Mako hypersonic missile model featuring the Lockheed Martin logo.
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A flight-operating crew member signals a F/A-18E Super Hornet fighter jet on the flight deck of the USS Dwight D. Eisenhower aircraft carrier in the Red Sea, 2024.
An F/A-18E Super Hornet fighter jet on the flight deck of the USS Dwight D. Eisenhower aircraft carrier.
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It can transform from helicopter to airplane in seconds, providing a vital role for the US military by ferrying troops in and out of combat zones.

But the V-22 Osprey has also caused the deaths of 62 service members. A crash in Japan last year grounded the entire fleet.

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A graphic rendering showing a future US Navy guided-missile frigate at sea.
A graphic rendering of the future guided-missile frigate USS Lafayette (FFG 65). Work on a new class of frigate has been experiencing delays.