McALLEN, Texas - The pilot of a Continental Airlines flight became ill = after takeoff and was later pronounced dead after the plane made an = emergency landing Saturday, a company spokeswoman said.=20 The 210 passengers on the flight, which departed from Houston, were = never in danger and the co-pilot landed the plane safely, Continental = spokeswoman Macky Osorio said. The airline said only that the pilot suffered a "serious medical = problem." Continental believes the pilot died of natural causes, Osorio = said.=20