By Michelle Nichols, Daphne Psaledakis and Humeyra Pamuk UNITED NATIONS (Reuters) -Russian Foreign Minister Sergei Lavrov defended Moscow’s war in Ukraine at the U.N. Security Council on Thursday as the United Nations warned Moscow against annexing Ukrainian regions and Western ministers called for accountability over atrocities. Lavrov was only in the council chamber to deliver his address to the meeting of the 15-member body, which was attended by U.S. Secretary of State Antony Blinken and China’s Foreign Minister Wang Yi. Lavrov did not listen to anyone else speak. “I noticed today that Rus…