NASA

NASA

Declares Tanking Test of SLS Megarocket

NASA

Around 30 minutes after the scheduled start time

NASA

at 7:30 a.m. (all times Eastern),

NASA

launch director Charlie Blackwell-Thompson gave the all-clear for tanking.

NASA

Starting with the core stage

NASA

ground crews started the process of putting more than 

NASA

700,000 gallons of fuel into the megarocket

NASA

 At the Florida's Kennedy Space Center's Launch Pad 39B

NASA

the 321-foot-tall (98-meter) rocket underwent today's cryogenic tanking test.