Dick Cheney 'ordered CIA to hide paln'

The US vice-precident, Dick Cheney ordered CIA hide the programme Sep 11. It's was a secretary for 8 years. They knew this program on 24 June, and Cheney hide this program. As you know, on Sep 11 Alqueda used flight to attack twin building in New York.
In my opinion, I think the U.S want to Alqueda attack because American have a reason to attack Afganishtan. In the world war, the U.S has opportunity to buy old weapons to another country. They earn money from buy weapon and they use this money to invest new weapon. American always uses the newest weapon in the world.
One new word
interrogate(v) to ask someone question in a through and often foreful.
This link of article is http://news.bbc.co.uk/2/hi/americas/8146466.stm