OSLO (Reuters) - Tunisian President Moncef Marzouki, alleged WikiLeaks whistleblower Bradley Manning, and former U.S. President Bill Clinton may be among the hundreds of nominees for the 2012 Nobel Peace Prize, rights activists say. The list of nominees, which is now officially closed for this year, is secret and Nobel officials would not comment on its contents. But experts have begun speculating about who is on the list and some people eligible to nominate candidates have publicized their suggestions. The committee added the final names for consideration on Friday. ...