For those who want to learn more, the book "Endless Frontier: Vannevar Bush, Engineer of the American Century" [0] by G. Pascal Zachary is very good. (G. Pascal Zachary also wrote "Showstopper: The Breakneck Race to Create Windows NT and the Next Generation at Microsoft")

[0] http://www.gpascalzachary.com/endless_frontier__vannevar_bus...

[1] http://www.gpascalzachary.com/showstopper__the_breakneck_rac...