The United States suspends bilateral trade talks with Russia . Ukraine - : Russian has sent 16,000 troops into Crimea . But Ukraine 's ambassador to the U.N. says Russia 's reasoning for a possible invasion is fake . Russia says Yanukovych asked them to send troops . Former Ukraine president has ` ` all the world '' for help in stopping Ukraine from losing Crimea .
The United States suspends bilateral trade talks with Russia . Ukraine - : Russian has sent 16,000 troops into Crimea . Russia says Yanukovych asked them to send troops . Former Ukraine president has ` ` all the world '' for help in stopping Ukraine from losing Crimea .