SEVASTOPOL, UKRAINE - MARCH 06:  Russian warships stand at the entrance to the main harbour on March 6, 2014 in Sevastopol, Ukraine. The Russian warships are on hand to prevent two Ukrainian warships, the Slavutych and the Ternipol, from eparting as a blockade by Russian-led forces of Ukrainian military facilities and assets continues on Crimea. Earlier in the day the Crimean Parliament voted to secede from Ukraine and join Russia.  (Photo by Sean Gallup/Getty Images)