WASHINGTON — Iran Supreme Leader Mojtaba Khamenei hasn’t released an audio or video message since assuming power because his face was badly burned in Israeli airstrikes on Feb, 28, according to a report — as President Trump says peace talks are inhibited by a lack of clear leadership in Tehran. Khamenei, 56, “does not want to appear vulnerable or sound weak,” four Iranian officials told the New York Times, adding that one of the ayatollah’s legs has been “operated on three times, and he is awaiting a prosthetic,” while he also has had surgery on one of his hands. “His...