Nasa says technical problems that have delayed the rocket are fixed and it is ready for launch.
"If you look at the data over time, over the lifespan of building new rockets, the data would show you that one out of two is successful. You're only successful 50% of the time. I think we're in a much better position than that," he said.
— Source: BBC Environment (https://www.bbc.com/news/articles/c4g8qp42rq6o)
