By Jonathan Landay, Humeyra Pamuk and Simon Lewis (Reuters) -The United Nations on Friday said it had no evidence Ukraine had a biological weapons program while Washington and its allies accused Russia of spreading the unproven claim as a possible prelude to launching its own biological or chemical attacks. Russia called the meeting of the 15-member U.N. Security Council to reassert through its envoy Vassily Nebenzia, without providing evidence, that Ukraine ran biological weapons laboratories with U.S. Defense Department support. Member countries called the claim “a lie” and “utter nonsense” …