For millions, it was an event that would be seared into their memories for the rest of their lives – on par with the Kennedy assassination and 9/11.

Update 1:49 p.m.: SpaceX's launch webcast is now posted above, right below our countdown clock. Liftoff is scheduled in four minutes from Cape Canaveral Space Force Station. SpaceX to launch NASA ...

Blue Origin's NS-29 New Shepard rocket is scheduled to launch Feb. 4 after a weeklong delay. Here's what to know ...

Corrections & Clarifications: An earlier version of this story misstated the date of the Space Shuttle ... had flown on a shuttle. Classrooms across America watched the launch.