EU foreign ministers are to meet for a special session in New York after Russian President Vladimir Putin signed a decree on Wednesday to partially mobilize the reservists in the country’s armed forces, sparking protests in several cities. As Putin looks for ways to throw more resources at his troubled invasion of Ukraine, he warned other states not to attack Russian territory, and alluded to nuclear retribution if someone chose to do so. “If the territorial integrity of our country is threatened, we will absolutely use all available means to protect Russia and our people. This is not a bluff,…