Boeing’s much-anticipated first astronaut flight faced another setback as last-minute computer trouble halted the June 1 launch attempt. NASA astronauts were strapped in when the countdown stopped automatically at T-3 minutes and 50 seconds. Technicians rushed to assist them, but the launch was called off. The glitch involved a sluggish computer near the rocket, necessitating a thorough investigation before the next attempt, possibly as early as Wednesday. Despite setbacks, NASA remains committed to having Boeing as a backup to SpaceX for crewed missions.