Two American space agency astronauts are making final preparations for the first crewed space flight to launch from American soil since 2011. Robert Behnken and Douglas Hurley - both former NASA shuttle pilots arrived at Florida’s Kennedy Space Center last week. They had been training at their home base in Houston, Texas. The astronauts are set to launch from Kennedy on a test mission to the International Space Station, or ISS, on Wednesday, May 27. They will fly on a Crew Dragon spacecraft, carried by a Falcon 9 rocket. The American company SpaceX designed and built each. The flight will be the first by a private company to send astronauts into orbit.