On Wednesday morning, NASA administrator Jim Bridenstine appeared before the US Senate Committee on Commerce, Science, and Transportation to discuss how to ensure US leadership in space. He used the appearance to make what is, for the aerospace community at least, a shocking announcement about the oft-delayed first launch of NASA’s Space Launch System (SLS) rocket and its Orion crew capsule.

“SLS is struggling to meet its schedule,” he said. “We are now understanding better how difficult this project is, and it’s going to take some additional time. I want to be really clear. I think we as an agency need to stick to our commitment. If we tell you, and others, that we’re going to launch in June of 2020 around the Moon, I think we should launch around the Moon in June of 2020. And I think it can be done. We should consider, as an agency, all options to accomplish that objective.”

And with that comment, Bridenstine opened the door to launching the Exploration Mission-1—which will not carry crew, but will test Orion in a deep-space environment over three weeks—on commercial rockets.