A U.S. official familiar with the latest administration assessment said Tuesday that national security agencies believe Putin will decide in the next few days whether to send more troops into Ukraine . Europe : Analyst says European allies must join U.S. in sanctions effort . President Obama says most nations believe Russia violated international law . $ 1 billion sanctions package announced as U.S. considers sanctions against Russia . Secretary Clinton says Russia tried to create a false pretext to further invade Ukraine .
Europe : Analyst says European allies must join U.S. in sanctions effort . President Obama says most nations believe Russia violated international law . $ 1 billion sanctions package announced as U.S. considers sanctions against Russia . Secretary Clinton says Russia tried to create a false pretext to further invade Ukraine .