Live coverage: Veteran three-man crew docks with space station

As his year-long mission aboard the International Space Station draws to a close, Expedition 46 commander Scott Kelly of NASA gives a final in-flight news conference with U.S. media on Feb. 25.

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.

Astronaut Scott Kelly, in good spirits and looking surprisingly fit after a record 340 days in space, said Wednesday he could have stayed up longer if necessary, giving him confidence future astronauts will be up to the challenge of even longer flights to Mars and beyond.