By Julia Harte and Tyler Clifford NEW YORK (Reuters) -Demonstrators in several major U.S. cities protested the invasion of Ukraine on Thursday, calling on Russian President Vladimir Putin to halt the missile and troop assault as U.S. President Joe Biden announced new sanctions against Russia. Despite freezing temperatures, hundreds of protesters in Manhattan marched to the Russian mission to the United Nations, some cloaked in Ukrainian flags and chanting “stop the war” and “stop Russia now.” New York City has the largest Ukrainian community in the United States. “I was born in Ukraine … but…