Why We Fight
Iraq for Sale
The Corporation
The BBC ones... Century of Self and The Trap
are all good, they might be at you local library free DVD rental place downtown.
Prescription for Disaster looks good as does the Supermarket Secrets one.
The only criticism I can see is that they might not agree with your preconceived political orientation which is all the better. It'll sharpen that old synaptic noodle.
