Photos: Falcon takes flight

A SpaceX Falcon 9 rocket will launch an Intelsat communications satellite with a NASA-funded air pollution monitor to be positioned over the Americas in 2022, officials announced Tuesday.

Watch a time-lapse video as the Falcon Heavy is moved into position for prelaunch testing at the Kennedy Space Center’s pad 39A on January 12, 2018.

SpaceX engineers have narrowed the cause of last week’s unsuccessful landing of a Falcon 9 rocket booster on a barge in the Atlantic Ocean on a commanding issue with an engine throttle valve, according to Elon Musk, the company’s founder and chief executive.