Astronauts Bob Behnken and Doug Hurley are slated to be the first humans to leave earth from the United States since the space shuttle was retired in 2011. Earlier in the week, a first launch attempt was scrubbed due to poor weather conditions. TIME’s coverage includes interviews with SpaceX CEO Elon Musk, NASA Administrator Jim Bridenstine, current and former astronauts, with commentary from TIME’s Editor at Large, Jeff Kluger…