article_snippet.sent: people and/or a mix of passengers and payloads to altitudes .
article_snippet.sent: Testing and development of the rocket engine, called
article_snippet.sent: oxygen- and liquid hydrogen-fueled motor is attached to the New .
article_snippet.sent: Blue Origin's Orbital Reusable Booster System .
article_snippet.sent: spaceflight and developing systems to carry people into orbit.
article_snippet.sent: vehicle into an orbital launch system, expected to begin flying .
article_snippet.sent: vehicle into an orbital launch system, expected to begin flying will be powered by a liquefied . natural gas motor, called the BE-4, that is being developed with .
article_snippet.sent: serve as an upper-stage motor to fly satellites into orbit, .