(NBC News) As Russia tightened its grip on Crimea Wednesday, Vice President Biden issued a warning to Vladimir Putin:
"As long as Russia continues on this dark path, they will face increasing political and economic isolation," Biden said.
Still, Putin's path is not wavering.
At Ukrainian Naval Headquarters in Crimea, Russian speaking militia members forced open the gate and turned the base over to the Russian Navy.
Some Ukrainian troops fled.
Ukrainian pilots and crew held their ground at a nearby airbase, but they're surrounded and
their U.S.-made warplanes are grounded.
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