Pentagon Wars is just idiotic, far from reality fantasy of some left wing moron from Hollywood (guess why I stoped to watch Hollywood movies, because the golden era when there were no leftiests had ended).
You want to learn the true history of development of M2 Bradley and other light tracked AFV's in US?
Read Richard P. Hunnicutt book
Bradley - A History Of The American Fighting And Support Vehicles.
To these that do not know R.P. Hunnicutt books, few short words, these 10 books, are a real bible for people that are interested, and want to learn more about history of research and development of American armored fighting vehicles, from WWII to present day. Author is real proffesionalist, his books are based on documents from TACOM Archieves, and what is more important, are completely focused on the subject, without any political mumbo jumbo and "my ..... is bigger than yours" BS.