The Russian Army Prepares for an Invasion of Crimea

The Russian military is preparing for an invasion of Crimea, CNN's John Defterios says. The prospects for an amphibious landing against Crimea are pretty low because the Ukrainians don't have that aid, he adds. "I think a more likely scenario is you're going to see the Russians isolated in Crimea," Defterios writes. 'This is more than a worst case scenario'