Live coverage: SpaceX Falcon Heavy launches NASA’s Psyche on mission to a metal asteroid

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.

The Falcon 9 booster assigned to launch two NASA astronauts on an orbital test flight of SpaceX’s Crew Dragon capsule has been test-fired in Texas, but the schedule for the long-awaited mission remains unclear.

The 100th flight of America’s Evolved Expendable Launch Vehicle program — a United Launch Alliance Atlas 5 rocket — departed Cape Canaveral on Saturday evening carrying the most advanced U.S. weather satellite ever made.