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 .
The United States suspends bilateral trade talks with Russia . Ukraine envoy : Russian has sent 16,000 troops into Crimea . Russia says Yanukovych asked them to send troops . Former Ukraine PM asks `` all the world '' for help in stopping Ukraine from losing Crimea .