U.S. warship leads drills in Russia's back yard, a message that the Black Sea is "for everybody"

Black Sea, on board the USS Ross — A tense confrontation between a British warship and the Russian military was captured on camera late last month. Russian planes buzzed the British vessel and issued hostile warnings. The incident took place in the Black Sea, where the U.S. and dozens of other countries are still conducting military exercises.

Russia has refused to allow foreign ships to pass through what it considers its territorial waters off the Crimean Peninsula — territory that Moscow unilaterally annexed away from Ukraine in 2014. Russia has threatened to bomb any vessels that enter the area. The U.S. Navy destroyer USS Ross left the Ukrainian port of Odessa recently to lead the military drills in the Black Sea, and CBS News' Holly Williams is the only American network correspondent on board the warship.