ANCHORAGE, Alaska - The mayor of Alaska's largest city submitted his resignation Tuesday evening, four days after an anchorwoman at a local television station threatened to report he had posted nude photos of himself on a website.Ethan Berkowitz, a native of San Francisco who attended UC Hastings Law School, adamantly denied her allegations, but on Monday admitted he had an inappropriate relationship with Maria Athens, the anchor at a Fox/ABC combined station in Anchorage."It is with profound sadness and humility that I resign as mayor of the Municipality of Anchorage," he said in a statement read at the Anchorage Assembly meeting by his chief of staff, Jason Bockenstedt, and later emailed to the media."My resignation results from.