Kennedy Space Center (United States) (AFP) - A SpaceX rocket carrying two veteran NASA astronauts was headed for the International Space Station on Saturday on the first ever crewed flight by a private company, ushering in a new era in space travel.The two-stage Falcon 9 rocket with astronauts Robert Behnken and Douglas Hurley aboard blasted off flawlessly in a cloud of bright orange flame and smoke from Florida's Kennedy Space Center for the 19-hour voyage to the orbiting space station."Let's light this candle," Hurley, the spacecraft mission commander, told SpaceX mission control in Hawthorn...