U.S. vows more sanctions after Russia annexes Crimea

Mar 18, 2014, 2:32 PM EDT
WASHINGTON, DC - MARCH 17: U.S. President Barack Obama gives a statement on the situation in the Ukraine in the Brady Press Briefing Room of the White House on March 17, 2014 in Washington, DC. The U.S. and the European Union have imposed sanctions on Russian and Ukraine officials in response to their actions that supported the referendum for Crimean separation. Credit Alex Wong/Getty Images
Alex Wong/Getty Images

The White House is vowing to level additional sanctions on Russia after President Vladimir Putin formally annexed Crimea on Tuesday.  President Obama will be meeting with G7 leaders next week to discuss the escalating showdown over Ukraine.