The Obama administration does not seem to have many options in response to the Russian.
said Washington The United States and Europe, although rejected use of military capabilities, can still exert pressure on Moscow by the Russian show more something to lose.
White House, in a statement, the Russian threat could be "isolated politically and economically."
However, to date Washington has been using diplomatic measures.
Ministry Chuck Hagel defense secretary has talking with Russian counterparts on Saturday.
European Union, the International Monetary Fund (IMF) and the United States are considering financial assistance to the new government in Kiev.
Treaty Organization North Atlantic (NATO) held an emergency meeting on Sunday.
Nato secretary general said Russia had violated the law by military action in Ukraine.
Ukraine is not a NATO member, the United States and Europe, so there is no obligation to protect .
walking Some people say Americans are most likely to send a few ships in the Black Sea under the status unilaterally.
Several members of Nato and the EU's energy dependence on Russia. This makes them want to maintain good relations with Moscow.
however, if the United States and the European Union failed to Russian pressure, it can leave long-lasting consequences.
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