Hey all, thanks for the replies!
I added some titles to the list, so now I have this:
* Birth of a Nation (civil rights)
* The Untouchables (economics)
* Mississippi Burning (civil rights)
* Tora! Tora! Tora! (foreign policy)
* Malcolm X (civil rights)
* Martin Luther King stuff (civil rights)
* Thirteen Days (foreign policy)
* The Pacific (foreign policy)
* The Lost Batallion (foreign policy)
* Modern Marvels (economics)
* The Men Who Built America (economics)
* Aftershock (civil rights) --> it's on Youtube, nice
* Dr. Strangelove (foreign policy)
and I'm checking out the pbs-site, very useful! Thanks!
More ideas? Keep 'em coming! And just to make sure: non-Americans can chip in anytime, of course