Videos: Replays from successful Atlas 5 launch of TDRS-M

The SpaceX Crew Dragon spacecraft that carried four astronauts to the International Space Station in November broke the record Sunday for the longest spaceflight by a U.S. crew vehicle, surpassing the 84-day mark set by an Apollo capsule on the final flight to the Skylab space station in 1974.

SpaceX is still working on a new, safer helium tank design needed for launches with astronauts, and the debut of the company’s upgraded Falcon 9 Block 5 rocket earlier this month did not count as one of seven successful missions in “crew configuration” NASA says it requires before putting astronauts aboard the vehicle, officials said Thursday.

SpaceX aims to launch the first Falcon Heavy rocket in November, company chief Elon Musk said Thursday, the latest in a series of schedule targets for the heavy-lift launcher’s delayed debut.