The two NASA astronauts who will climb into the Demo-2 capsule atop the SpaceX Dragon rocket for Wednesday’s historic mission are launch veterans: Bob Behnken and Doug Hurley. They will lift off from the same launchpad at the Kennedy Space Center that hoisted the crew of Apollo 11 to the moon. Behnken was an experienced Air Force test pilot when he was first selected by NASA to join the astronaut corps in 2000. He last visited space on a shuttle mission in 2010. SPECIAL SECTION: Launch AmericaThis, by the way, is the first time Behnken and Hurley have flown together.