Watch the Falcon Heavy fire up its engines

Dan Hart leads a staff of hundreds of engineers and technicians developing LauncherOne, a commercial air-launched booster intended to hurl small satellites weighing up to 1,100 pounds (500 kilograms) into orbit.

Confronted with pesky problems in the Falcon 9 rocket’s helium pressurization system, SpaceX has shuffled the order of the next two launches, choosing to go ahead with the liftoff of a Dragon supply ship on a cargo delivery flight to the International Space Station around April 10.

An upgraded Geosynchronous Satellite Launch Vehicle carrying more fuel and standing taller than earlier GSLV variants took off Wednesday from an Indian spaceport and delivered a new communications satellite to orbit for the Indian Air Force.