Derrol Nail: Bob Behnken and Doug Hurley will make history when they break the bond from Earth in a SpaceX Crew Dragon capsule that’s never been flown by humans before. But find out how the strong bond of friendship they share gives them the edge in space. Next on the Rocket Ranch. Launch Countdown Sequence: EGS Program Chief Engineer, verify no constraints to launch… 3, 2, 1, and lift off. Welcome to space. Derrol Nail: Along with launch crews from NASA and SpaceX, astronauts Bob Behnken and Doug Hurley have been very busy preparing for space flight. They will…