The U.S. must decide how far is too far . Frida Ghitis : What will President Obama do about the Ukraine crisis ? Ghitis : The U.S. has been reluctant to use military force in Ukraine, but it is now facing a new set of challenges as Russia continues its invasion and occupation of eastern Ukraine. She says U.S. should impose real sanctions or else it looks like paper tiger . Ghitis : U.S. military intervention is slim ; Obama could turn his back on Ukraine .
Frida Ghitis : What will President Obama do about the Ukraine crisis ? Ghitis : The U.S. has been reluctant to use military force in Ukraine, but it is now facing a new set of challenges as Russia continues its invasion and occupation of eastern Ukraine. She says U.S. should impose real sanctions or else it looks like paper tiger . Ghitis : U.S. military intervention is slim ; Obama could turn his back on Ukraine .