Regarding the Iraq war.
Why did we go to war in Iraq? Was Saddam Hussein in cahoots with Osama Bin Laden? Who said that he was? Who was Hans Blix and what did he say about the proposed invasion? What kind of coalition did we put together and what did the UN and the Pope say? What was wrong with the Administration's evidence for war (presented to the American people and the UN) and who apologized for it? What were the expectations for the war - how we would be received, how long it would last, how much it would cost, etc?
Here is a documentary that gives some background to the current situation in Iraq.