Russia has chance for 'diplomatic way out' of Ukraine crisis: US ambassador to UN

The U.S. ambassador to the United Nations warned that Russia’s military buildup on the Ukraine border signals the Kremlin's "intentions to use them."

U.S. Ambassador to the United Nations Linda Thomas-Greenfield warned on Sunday that Russia's menacing military troop buildup on the Ukraine border signals the Kremlin's "intentions to use them," noting that Russia still has a chance to "find a diplomatic way out."

Thomas-Greenfield's comment on Sunday in an interview with ABC's "This Week" anchor George Stephanopoulos came on the eve of an open U.N. Security Council meeting she requested to discuss Russia's aggression toward Ukraine and what to do about it.

Stephanopoulos pressed Thomas-Greenfield, asking, "Does the U.S. believe an invasion is imminent?"

"You don't amass 100,000 troops if you don't have intentions to use them," Thomas-Greenfield said.