<p>U.S. Ambassador Zalmay Khalilzad exchanged sharp remarks with the Russian ambassador on Sunday, accusing Moscow of resisting attempts to make peace with Georgia after days of fighting have left hundreds of civilians dead.</p>
<p>Khalilzad pointedly asked Russian Ambassador Vitaly Churkin in the U.N. Security Council session whether Russia's aim was to "change the leadership in Georgia" _ a charge Churkin did not directly address but seemed to deny.</p>