The crew of the first entirely private mission to dock with the International Space Station (ISS) arrived on Saturday after a flight of more than 20 hours, live images from the US space agency NASA showed. The space travellers had an unplanned wait of about 45 minutes at a distance of 20 metres from the ISS because of a problem with a video camera needed for the docking manoeuvre. The Ax-1 mission blasted off on Friday from Cape Canaveral in Florida in a Crew Dragon space capsule, boosted by a Falcon 9 rocket. It carried the first wholly private crew, made up of Spanish-American astronaut Mich…