The black boxes from the planes that crashed into the World Trade Center on September 11, 2001, were found and retrieved in the weeks after the 9/11 attacks, a significant amount of evidence indicates. And yet government officials and the official investigation into the attacks have asserted that these devices were never recovered.
A plane's two black boxes record important information about a flight. The black boxes from American Airlines Flight 11 and United Airlines Flight 175--the planes that hit the World Trade Center--could therefore have helped investigators determine what happened on these aircraft before they crashed on September 11.
A number of people who were involved in the recovery effort in the weeks after 9/11 have said they saw or helped recover objects at the World Trade Center site that appeared to be black boxes from a plane. One worker unearthed an object that looked like a black box at Pier 25 on the Hudson River. FBI agents who inspected the object initially said enthusiastically that it appeared to be a black box, but subsequently said they didn't think it was one of these devices. A firefighter has described helping FBI agents retrieve three black boxes at Ground Zero and a colleague of his recalled seeing one of these being recovered.
Additionally, investigators reportedly detected a signal that was being emitted by one of the black boxes from Flight 11 or Flight 175 and recovery workers were sent to search in the location where the signal was coming from.
One government official actually said off the record that all four black boxes from Flight 11 and Flight 175 were recovered. This was certainly a reasonable assertion. It would in fact have been unusual if the devices were never found, since a plane's black boxes are made to survive extreme conditions, and so the black boxes on Flights 11 and 175 should have withstood the conditions they endured on September 11.
Furthermore, experts have said they knew of no plane crashes, other than those at the World Trade Center, after which the black boxes weren't recovered. Indeed, the black boxes from the two other planes that were hijacked on September 11--American Airlines Flight 77 and United Airlines Flight 93--were recovered within a few days of the 9/11 attacks.
If the accounts of the black boxes from Flights 11 and 175 being found are correct, we need to consider why the discoveries went unreported. And why has it been officially claimed that no black boxes were found at the World Trade Center site?
Might it be because the information on the black boxes is inconsistent with the official account of the 9/11 attacks? Perhaps it indicates that rogue individuals in the U.S. government and military were involved in planning and carrying out the attacks. So in order to maintain the official account of 9/11, it has been necessary to prevent the information on the black boxes being made public.