First hotfire of our BE-4 engine is a success. Huge kudos to the whole @BlueOrigin team for this important step! #GradatimFerociter pic.twitter.com/0gk6k6WuPx— Jeff Bezos (@JeffBezos) October 19, 2017
First hotfire of our BE-4 engine is a success. Huge kudos to the whole @BlueOrigin team for this important step! #GradatimFerociter pic.twitter.com/0gk6k6WuPx