Happy 4, 3, 2, 1, Liftoff Day! It's April 3, 2021. #Liftoff #NASA #NASAHistory #MarshallSpaceFlightCenter #MSFC #SA4 #SA4Launch #RocketLaunches #SpaceExploration #Happy4321Day
https://www.nasa.gov/centers/marshall/history/images/this-week-in-nasa-hi…
