(CNN) -  A fired United Airlines flight attendant plans to admit
in court that he made eight bomb threats against his former
airline.  Patrick Cau, 40, a German citizen living in Los
Angeles, was arrested in January while training for a flight
attendant job at another airline -- American.  Although the
threats received widespread attention at the time, news of his
arrest and the charges are just coming to light now.  In a plea
agreement with federal prosecutors, Cau admitted to making eight
bomb threats between Oct. 4, 2012, and Jan. 2, 2013, from pay
phones in Los Angeles, New York City, Las Vegas and Seattle. In
each case, the caller claimed explosives had been placed on
United flights.  The threats disrupted law enforcement and
inconvenienced passengers, according to the court filing.  Each
time, officials evacuated planes, re-screened passengers and
searched bags and cargo, but did not find explosives.  Cau's
attorneys, John Duran and Craig Charles, said he worked at
United for 15 years as a purser, or fl