The United States called an emergency meeting of NATO ministers Monday to argue for a unified response to punish Russia for its invasion of Georgia. Officials said Moscow had positioned missile launchers in a new threat to the Georgian capital. Secretary of State Condoleezza Rice headed to Europe to talk with NATO allies about what message the West should send to Russia about the military intervention. Amid worsening relations with Moscow, NATO foreign ministers are expected to consider a range of military, ministerial and other activities planned with Russia and decide case by case at the meeting Tuesday whether to participate in each activity. Allied ministers also will discuss support for a planned international monitoring mission in the region and a package of support to help Georgia rebuild infrastructure damaged in its devastating defeat at the hands of the Russian armed forces.