Two of the world's most advanced warplanes have touched down in Romania for the first time, near the shores of the Black Sea and just a short hop from Ukraine, the Crimean Peninsula and Russia.
The United States sent the F-22 Raptors to southeastern Europe two weeks after Russian fighter jets buzzed an American warship in the Baltic Sea.
Officially it was for a NATO training exercise, part of the Rapid Response program showcasing how effectively and quickly U.S. fighter jets, crews and support can be moved to a forward operating base.
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The F-22s are known for speed and stealth.
But it was also a show of strength for NATO allies on the Black Sea, where Russia is rapidly building up its military hardware.
The F-22s are known for speed and stealth -- able to travel at twice the speed of sound and hard to spot on radar.