A sign of common cause in Geneva.<br/> <br />Russia, Ukraine, the U.S. and EU agree to an immediate halt to violence in Ukraine -- where Western powers believe Russia is fomenting a pro-Russian separatist movement.<br/> <br />U.S. President Barack Obama welcomes the move.<br/> <br />(SOUNDBITE) (English) U.S. PRESIDENT BARACK OBAMA SAYING:<br/> <br />"There is the possibility, the prospect, that diplomacy may de-escalate the situation."<br/> <br />He told White House reporters it will take a few days to see if Russia embraces the agreement.<br/> <br />(SOUNDBITE) (English) U.S. PRESIDENT BARACK OBAMA SAYING:<br/> <br />"The question now becomes: will, in fact, they use the influence they've exerted in a disruptive way to restore some order so that Ukrainians can carry out an election and move forward with the decentralization reforms that they've proposed?"<br/> <br />And he has reservations.<br/> <br />(SOUNDBITE) (English) U.S. PRESIDENT BARACK OBAMA SAYING:<br/> <br />"My hope is that we actually do see follow through over the nex
