The Former Cat Stevens Gets Plane Diverted WASHINGTON - A London-to-Washington flight was diverted to Maine on Tuesday when it was discovered passenger Yusuf Islam - formerly known as singer Cat Stevens - was on a government watch list and barred from entering the country, federal officials said.    United Airlines Flight 919 was en route to Dulles International Airport when the match was made between a passenger and a name on the watch list, said Nico Melendez, a spokesman for the Transportation Security Administration...