CAPE CANAVERAL, Fla. (AP) – The astronauts launched into orbit by SpaceX have joined in the ringing of the opening bell for Nasdaq. NASA astronauts Doug Hurley and Bob Behnken took part in the ceremony from the International Space Station, three days after their historic launch on a rocket built and owned by Elon Musk’s company. They floated alongside space station commander Chris Cassidy as he rang a ship’s bell to open trading on the Nasdaq Stock Exchange.