<blockquote>The CIA won’t discuss the Mohammed’s vacuum plans, either. The AP asked the CIA for copies of the vacuum designs or any government records about them under the Freedom of Information Act.

The CIA responded in a letter to the AP that the records, “should they exist,” would be considered operational files of the CIA – among its most highly classified category of government files – and therefore exempt from ever being released to the public.</blockquote>
via <a href="http://www.outsidethebeltway.com/khalid-sheikh-mohammed-designed-vacuum-cleaner-while-in-cia-custody/">Khalid Sheikh Mohammed Designed Vacuum Cleaner While In CIA Custody</a>.