A NASA research plane malfunctioned and had to touch down in Texas without landing gear on Tuesday, sliding across the runway on its belly and sending plumes of flame behind it, a video posted to social media showed.

Four astronauts have entered quarantine ahead of the first mission around the Moon in more than 50 years. The Artemis II mission is scheduled to lift off at some point next month, with Nasa rolling out the rocket earlier this month ahead of the launch window opening in early February.