Ukraine-Russia crisis: What to know about the fears of war

The chill of a Cold War hangs over Eastern Europe again

BRUSSELS -- The chill of a Cold War hung over Eastern Europe again Friday, with Russian military maneuvers and drills close to Ukraine and the U.S. escalating its dire warnings about a possible Russian invasion of Ukraine, saying it could take place within days.

Diplomats and government leaders, meanwhile, struggled ever more to jumpstart moribund talks to stave off full-out war.

Here's a look at what is happening where and why:

STARK WARNINGS FROM THE WHITE HOUSE