Speaking of documentaries, I think the three greatest documentaries I have ever seen were:
3. Ken Burns' Baseball
2. Ken Burns' Civil War and
1. The Great War and the Shaping of the 20th Century
All three were outstanding and heartily recommended. According to many blogs, websites and writers, President Bush felt the World War I documentary was actually a veiled pacifistic effort and had an anti-war bent and did his part to see that it was pulled from production on VCR tape and never released on DVD. The reason given for this is that we were involved in a war in the Middle East and viewing this film series was counter-productive to the attitude toward the war effort. In 1996 when it was released on PBS, it won two Emmys including one for Best informational Series and in 1997 won a Peabody. To this date, it has never been released on DVD and is extremely difficult to find. I have seen copies of the 4 VCR tape set go for $500 on ebay when they are available. I haven't checked lately but over the last 7-8 years I have watched their sales, they were extremely rare. Regardless of your political leanings, this is an incredible series and should be watched.
Amazingly you can go to the PBS web site and order any of their past documentaries and shows on VCR or DVD, but this one is glaringly absent.
http://www.pbs.org/greatwar/