IamA retired NASA Engineer. I worked for NASA in its infancy beginning in 1954 up into the shuttle program. AMA!
**My short bio: I was an RCA engineer contracted to work for NASA, from 1954 until 1988. I worked in the Range Safety division for NASA before the Mercury program even began. I was able to witness firsthand the race to space, landing our men on the moon and more. I rubbed shoulders with Von Braum, I've shaken hands with John Glenn, Alan Shepherd and more.
My Grand-son is helping my answer questions.
EDIT 2:29 CST: Time to close shop, everyone! He needs some rest. Hope everyone has enjoyed!