ORLANDO, Fla. — A postal worker says a mysterious leaking package from Yemen has left him seriously ill, but the U.S. Postal Service denies the package ever existed. The Florida Center for Investigative Reporting, in a story printed in Sunday's Miami Herald and The Ledger of Lakeland, reported that Jeffrey A. Lill suffers from extreme fatigue, tremors, and liver and neurological problems. The symptoms are consistent with toxic exposure, problems that he said began after he handled the leaking package on Feb. 4, 2011. The center tracked down co-workers who said that they saw and smelled the package and that...