9-11: If there's nothing to hide, why the shoddy investigations?

When complex crimes are committed, some of the most telling evidence comes from the cover-up.

Everyone should have suspected something was fishy when Ruby shot Oswald before he got a chance to talk. What most people don't know is that the debris from the World Trade Center was heavily guarded and then "cleaned up" before it had "a chance to talk."

This article, written by the editor of Fire Engineering Magazine, came out soon after the 9/11/01 attacks. It was one of the first that really made me question what happened that day: Coverup at Ground Zero: Selling Out the Investigation. Destruction and Removal of the Evidence by Bill Manning

Most people don't know that far more money was spent investigating Bill Clinton's sex life than ever was spent investigating the crime of the century. Did you know that a tape made by air traffic controllers describing the events was crushed by a "quality-assurance manager there" who then "shredded the tape and dropped the pieces into different trash cans around the building, according to a report made public today by the inspector general of the Transportation Department." -- NY Times 5/6/04

And what's with the black boxes? All commercial airplanes are required to have flight data recorders and cockpit voice recorders. Obviously they are contained in units designed to be indestructible. Why did the FBI and the 9/11 Commission Report say, "The CVRs and FDRs from American 11 and United 175 were not found" [ http://911research.wtc7.net/planes/evidence/blackboxes.html ]?

Move along folks, nothing to see here ...