President Joe Biden speaks about Ukraine in the Roosevelt Room of the White House, Friday, Feb. 18, 2022, in Washington. (AP Photo/Alex Brandon)President Joe Biden speaks about Ukraine in the Roosevelt Room of the White House, Friday, Feb. 18, 2022, in Washington. After weeks of saying the U.S. wasn’t sure if Putin had made the final decision to invade, Biden said that assessment had changed, citing American intelligence. ADVERTISEMENTBiden reiterated his threat of massive economic and diplomatic sanctions against Russia if it does invade, and pressed Putin to rethink his course of action. ADVERTISEMENTImmediate worries focused on eastern Ukraine, where Ukrainian forces have been fighting pro-Russia rebels since 2014 in a conflict that has killed some 14,000 people.