The first four #NASASLS flight engines are ready to rumble! Read more about the engines and SLS here >> https://t.co/vchcyphema pic.twitter.com/Hn7j8XzxvU— NASA_SLS (@NASA_SLS) October 12, 2017
The first four #NASASLS flight engines are ready to rumble! Read more about the engines and SLS here >> https://t.co/vchcyphema pic.twitter.com/Hn7j8XzxvU