Watch nasa's spacex Crew-1 launch with an expert panel of former NASA Astronauts: astromikemassimino, astro_peggy, astro_g_dogg, and lelandmelvin all on #SpaceLaunchLIVE: Crew-1 Lift Off. Today starting at 5P ET on Discovery. #nasa #spacex #crewdragon #falcon9 #liftoff #astronauts #space