Ukraine-Russia crisis: What to know about rising fear of war

World leaders are trying to walk a diplomatic tightrope that could mean the difference between war in Ukraine and an uneasy peace there as Russia’s menacing actions on the border of its neighbor continue unabated

BRUSSELS -- Several world leaders lined up Monday to walk a diplomatic tightrope that could mean the difference between war in Ukraine and an uneasy peace there as Russia's menacing actions on the border of its neighbor continued unabated.

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

FROM MOSCOW TO WASHINGTON

Russian President Vladimir Putin was back at the Kremlin in Moscow following his diplomatic foray to get support from China over the weekend during the Winter Olympics. Putin was hosting the prime meeting of the day Monday as his French counterpart Emmanuel Macron was on a mission to de-escalate tensions.