standing over her shoulder is richard feynman and we do bridge. everyone in the room is waiting on her calculations to find out if this mission will be a success. when she calculates that yes, explorer one has made it, america has its first satellite. the room erupts in celebration. it is an incredible moment. it is also the birth of nasa. after explorer one, everything changes. leave military design behind and are focused on space. >> learn more about the rocket girls recruited in the 1940's and 50's to work at the jet propulsion laboratory this sunday at 9:00 eastern here on american history tv. on lectures in history, a professor teaches a class on how the cold war influenced and was influenced by photography. he talks about the perceived documentary nature of photography and how this idea was manipulated during the cold war. use ofy's lead use -- doctored photos, for example.

standing over her shoulder are richard feynman the famous , physicist, and the president of caltech. everyone in the room is waiting on her calculations to find out if this mission will be a success. when she calculates that yes, explorer 1 has made it and america has its first satellite, the room erupts in celebration. it is an incredible moment. it is also the birth of nasa. 1, everything changes. the women leave military design behind and are focused on space. things are also changing for barbara. macie roberts is now retiring, and barbara, who has worked there for a decade, has been promoted to supervisor of the computing section. however she is also 30 years old ,, she is about to get married and about to start a family. in 1960, only 25% of mothers worked outside the home. but barbara decides that she loves her job, she feels her work is too important, and she definitely wants to stay. so you can imagine how shocked she is when, at eight months pregnant, the lab's administrators learn she is expecting and immediately fire her. they tell her she is an insurance liability, and it

and standing over shoulder are richard feynman, the famous physicist, and lee -- the president of calech. and everyone in the room is waiting on her calculations to find out if this mission would be a success. when she calculates that, yes, explorer i has made it, the room erupts in celebration. it is an incredible moment. it is also the birth of nasa. after explorer i, everything changes. the women leave military design behind and are now focused on space. the rockerre about girls recruited in the 1940's and 1950's to work at the jet propulsion laboratory this sunday at 9 p.m. eastern here on american history tv. u.s.g world war ii, the marine corps recruited navajo indians to create a code based on their line was to help the military secretly communicate operational plans. next in a series of interviews, coder navajo doe -- talker samuel jesse smith talked about his early life conducted between 2004 and 2006 the interviews took place at his home on the navajo national tribal lands in arizona and on the pacific islands where he served. mr. smith reflects on his assignment with the fo