These aerial photos of billowing smoke, collapsing buildings and scattering debris were released recently for the first time. They're from the archives of the National Institute of Standards and Technology, originally collected as part of the investigation of the 9/11 attacks. In response to a Freedom of Information Act request, ABC received nine burned CDs containing 2,779 pictures; many had been taken from police helicopters and had never before been seen by the public. Twelve, including the ones shown here, are posted to its website. more ›

One of the lingering conspiracy theories surrounding the attacks on September 11, 2001 is that 7 World Trade Center, which was not hit by a plane, was deliberately destroyed (here's one example of a conspiracy website), because no other steel building has collapsed simply due to fire before. But now a report from the National Institute of Standards and Technology says that the fire is the culprit. more ›