ORLANDO, Fla — A couple of space rookies are joining a couple of veterans on a trip to the International Space Station this week, but one of them will open a new door of diversity as the first Black woman assigned for long-term duty on board. Jessica Watkins, 33, is heading the ISS for her first trip to space as part of the Crew-4 mission set to launch on a new SpaceX Crew Dragon named Freedom. Liftoff from Kennedy Space Center’s Launch Pad 39-A is set for Saturday at 5:26 a.m. Watkins arrived at the former shuttle landing facility at KSC on Monday with crewmates Commander Kjell Lindgren and p…