A group of armed unidentified gunmen cut electric power to General Headquarters of the Ukrainian Naval forces in Sevastopol,Ukraine Sunday, March 2, 2014. Russian President Vladimir Putin has defied calls from the West to pull back his troops, insisting that Russia has a right to protect its interests and the Russian-speaking population in Crimea and elsewhere in Ukraine.(AP Photo/Andrew Lubimov)

A group of armed unidentified gunmen cut electric power to General Headquarters of the Ukrainian Naval forces in Sevastopol, Sunday, March 2, 2014. Russian President Vladimir Putin has defied calls from the West to pull back his troops, insisting that Russia has a right to protect its interests and the Russian-speaking population in Crimea and elsewhere in Ukraine.(AP Photo/Andrew Lubimov)