Q&A with Jeff Bezos, founder of Blue Origin

When the countdown hit zero last Friday and the engines powering a previously flown Falcon 9 first stage roared to life for takeoff, the four astronauts strapped into a SpaceX Crew Dragon some 21 stories up started laughing.

SpaceX engineers are preparing to mount a Falcon 9 rocket at Kennedy Space Center’s historic launch pad 39A for the first time this week as the company declares the modified facility ready to support a new era of commercial space missions.

Russian cosmonauts Alexander Misurkin and Anton Shkaplerov floated outside the International Space Station on Friday and installed an upgraded electronics box on a high-gain communications antenna at the aft end of the Zvezda service module.