Watch the Falcon Heavy roar to life

Spaceflight Now editor Stephen Clark spoke live to International Space Station astronauts Shane Kimbrough and Megan McArthur about their mission Friday.

SpaceX’s second Falcon Heavy, outfitted to produce more thrust than the heavy-lifter’s debut flight last year, was raised vertical at launch pad 39A in Florida on Wednesday ahead of a launch attempt with the Arabsat 6A communications satellite.

NASA and the U.S. Air Force are expected to return to normal operations Tuesday after lawmakers passed a budget bill Monday evening, ending a government funding lapse that threatened to cut off live television coverage of an International Space Station spacewalk and interrupt SpaceX launch operations in Florida and California.