For 10 days, we tracked four astronauts on an epic moon mission , holding our breaths as they launched , listening along to their wake-up songs , celebrating as they broke a record and watching the emotional moment that they named a crater for their commander's late wife.   On Friday, the Artemis II crew joins "CBS Mornings" Earth-side for a special live town hall.  "Artemis II: A Celebration of Heroes," moderated by "CBS Mornings" co-host Gayle King and "CBS Evening News" anchor Tony Dokoupil,