"The White House warned Russia to keep its troops out of Ukraine on Sunday night, amid fears that Moscow may step in with military force following the overthrow of the president, its ally. The Crimean port of Sevastopol may be part of Ukraine, but it is the Russian tricolor that flutters proudly above the port’s barrack blocks and warships. Sevastopol has been a proud part of Russian imperial might since the 18th century, but in 1954 was transferred to Ukrainian control under Nikita Khrushchev, an ethnic Ukrainian. " (thanks Basim)