Among those interviewed by the Investigation Team, there was limited recollection of the organizations occupying some of the floors, especially those occupying smaller spaces, and no one had copies of all the tenant leases.

Shortly before 9:00 a.m. on Tuesday, September 11, 2001, about 4,000 people were at work in WTC 7. This was about half of the roughly 8,000 people who worked there. It was the first day of school for many local children, and it also was a primary election day in New York. The weather was clear and comfortable, so some had taken time to do early morning errands.

Building 7 Floor Schematic, NIST August 2008

The stairwells, although somewhat narrow for the maximum possible 14,000 occupants (estimated using the formula in the NYCCBC), were more than adequate to evacuate roughly one-third of that number in the building that morning (NIST NCSTAR 1-9, Chapter 7)

What specific code changes based on recommendations from NIST's investigation of the WTC towers have been approved for inclusion in the International Building Code? The eight specific code changes adopted in the International Building Code based on recommendations from NIST's investigation of the WTC towers include:

1. An additional exit stairway for buildings more than 420 feet in height.

Did WTC 7 conform to building and fire codes? The team found that the design of WTC 7 in the 1980s was generally consistent with the New York City building code in effect at that time.

WTC 7's designers intended its stairwells to evacuate nearly 14,000 occupants, anticipated at the time to be the maximum occupancy of the building. Though the stairwell's capacity was overestimated, it was adequate for evacuating the building's actual maximum occupancy of 8,000, and more than adequate to evacuate the approximately 4,000 occupants who were in the building on Sept. 11.

Why didn't the investigators look at actual steel samples from WTC 7? Steel samples were removed from the site before the NIST investigation began. In the immediate aftermath of Sept. 11, debris was removed rapidly from the site to aid in recovery efforts and facilitate emergency responders' efforts to work around the site. Once it was removed from the scene, the steel from WTC 7 could not be clearly identified. Unlike the pieces of steel from WTC 1 and WTC 2, which were painted red and contained distinguishing markings, WTC 7 steel did not contain such identifying characteristics.

And so he has sought to bring order to the chaos. Along the perimeter are rows of crushed police cars and fire engines, stacked on top of one another. A separate field has been created for the remains of 7 World Trade Center, which once housed regional offices of several federal agencies, including the Secret Service. In the dirt lay a pink-and-black chunk of its marbled facade.

An emergency responder caught in the building between the 6th and 8th floors says he heard two loud booms. Isn't that evidence that there was an explosion?

In June 2009, NIST began releasing documents in response to a Freedom of Information Act (FOIA) request from the International Center for 9/11 Studies for "all of the photographs and videos collected, reviewed, cited or in any other way used by NIST during its investigation of the World Trade Center building collapses." One of the items released, a video obtained from NBC News, shows World Trade Center Building 7 (WTC7) in the moments before it collapsed, then cuts to the collapse already in progress, with the building's east penthouse "disappearing" from the scene (as it had already fallen in the intervening time). Other videos of the WTC 7 collapse show the penthouse falling first, followed by the rest of the building. Did NIST edit the NBC News video to remove the collapse of the penthouse?

The video footage released under the FOIA request was copied from the original video exactly as it was received from NBC News, with video documentation of the WTC 7 east penthouse collapse missing. The footage was not edited in any way by NIST.

Did investigators consider the possibility that an explosion caused or contributed to the collapse of WTC 7? Yes, this possibility was investigated carefully. NIST concluded that blast events inside the building did not occur and found no evidence supporting the existence of a blast event.

In addition, no blast sounds were heard on the audio tracks of video recordings during the collapse of WTC 7 or reported by witnesses. According to calculations by the investigation team, the smallest blast capable of failing the building's critical column would have resulted in a sound level of 130 decibels (dB) to 140 dB at a distance of at least half a mile, if unobstructed by surrounding buildings. This sound level is consistent with a gunshot blast, standing next to a jet plane engine, and more than 10 times louder than being in front of the speakers at a rock concert.

For the building to have been prepared for intentional demolition, walls and/or column enclosures and fireproofing would have to be removed and replaced without being detected. Preparing a column includes steps such as cutting sections with torches, which produces noxious and odorous fumes. Intentional demolition usually requires applying explosive charges to most, if not all, interior columns, not just one or a limited set of columns in a building.

The account that follows is the result of an extensive, state-of-the-art reconstruction of the events that affected WTC7 and eventually led it its collapse at 5:20:52 p.m.. Numerous facts and data were obtained, then combined with validated computer modeling to produce an account that is believed to be close to what actually occurred. However, the reader should keep in mind that the building and the records kept within it were destroyed, and the remains of all the WTC buildings were disposed of before congressional action and funding was available for this Investigation to begin. As a result, there are some facts that could not be discerned, and thus there are uncertainties in this accounting. Nonetheless, NIST was able to gather sufficient evidence and documentation to conduct a full investigation upon which to reach firm findings and recommendations. The reconstruction effort for WTC7, the uncertainties, the assumptions made, and the testing of these assumptions are documented in NIST NCSTAR 1-9

After the total loss of its headquarters in Building 7 of the World Trade Center, from the surprise attack by Muslim terrorists on September 11th, the 2,500 employees of Citibank's Soloman, Smith, Barney unit housed there were back-filled into existing corporate offices located elsewhere.So it was puzzling to real estate experts, as the Wall Street Journal reported, when in the weeks following the attack, Citibank sought to divest itself of a further block of 300,000 square feet of space that Soloman was then currently occupying downtown. How could the utilization of a combined million-and-a-half square feet of office space have suddenly become unnecessary, they wondered?But it is questionable if 2,500 Soloman employees were actually working in Building 7 on September 11th, as the Journal reported. Within the previous year, Soloman had merged with Travelers Insurance, and together they'd been bought out by Citibank only four months before the attacks.Even with a possible restructuring and layoffs underway, the number of employees who reportedly were occupying the space in Building 7 is an impossibly low figure given the amount of space Soloman was understood to be leasing there.Making this determination requires some effort, as the available facts seem designed to elude us. A note in the NIST draft report released on August 21, 2008 , saidSince major tenants like the United States government didn't think to keep backups, or off-site copies of their lease agreements, and with the principals unwilling, or too traumatized, to agree on even minimal outlines of the tenancy in Building 7, we're left with a jumbled and unreconciled accounting instead of facts.Two tenant's lists make up the official record. They come from the 2005 FEMA WTC Building Performance Study , and the 2008 NIST WTC Investigation Report, and they are much at odds. FEMA, for instance, has the Standard Chartered Bank occupying the entire 26th and 27th floors, while NIST gives those floors over to Soloman. FEMA has the National Association of Insurance Commissioners Securities Valuation Office as sole tenant on the 19th floor, while the more definitive NIST account doesn't even mention NAIC, or the Standard Chartered Bank. These are hardly the sort of "smaller spaces" tenancies that might slip the mind.It can't be understand precisely which floors make up the lease-able space even. The FEMA list has the top two penthouse floors indicated as mechanical spaces, while the NIST document has Soloman occupying at least some portion of those floors.In contrast, a commercial real estate organization called the CoStar Group was the source for the first tenant's lists distributed by the media, like one maintained by CNN . It has far better information on the leasing arrangements, including a square-footage allocation for each company.There we find that the third-largest block-holder of space in Building 7 is the Standard Chartered Bank, listed as sharing two floors with Soloman, and two other floors with the Secret Service and the Securities & Exchange Commission. Subsequent newspaper articles informed us that the Standard Charter bank was actually a CIA-ran business front.So it would appear that personal enterprise has become inextricably mixed up with a privatized public good. And for those of us on the outside, it's troubling to see this scrim, which hides the interplay between a powerful investment banking house, and the regulatory agencies, and secretive governmental intelligence networks, that mean to monitor and inform it.Off the CoStar list, we can infer that each floor of Building 7 has about 45,000 square feet of rentable space, so we can divide Soloman's block of 1,202,900 square feet and determine that the bank occupied 26 full floors. The other allotments add up to 750,800 square feet, which make for an additional 16 floors in the building---or 42 fully tenantable floors, This establishes a 4-to-7 occupancy ratio for Soloman to the other users.The NIST account narrative starts outIf 8,000 people worked in Building 7, it represents 190 workers for each of the 42 tenant floors. Soloman's 26 floors would then have an occupancy total of 4,952 employees---or almost twice the number who were said to be relocated after 9/11.Other factors, like the intensity of use between various floors, or the time of worker's arrival, don't matter. If Soloman indeed employed only 2,500 workers in Building 7, they could be split up with just 96 workers to a floor, but then the other 5,500 workers out of 8,000, would have to divide into the 16 remaining floors, for a census of 343 employees per floor. A tight fit, even for the CIA!The floor schematic below is from the NIST report. It depicts a hundred spacious private offices on a floor occupied by the SEC---60 of which have windows. The football-field sized floor occupied by American Express has a warran of office cubicals, but even so, 343 is a squeeze.Apparently, that density is contemplated, as NIST tells usAn occupancy of 14,000 makes for 333 per floor. But NIST can't keep its story straight one way or the other. Their public affairs office Factsheet, updated September 17, 2010, Questions and Answers about the NIST WTC 7 Investigation, proposes that an additional staircase be added to the already "more than adequate" egress:The Factsheet goes further, even contradicting itselfSo why are they proposing an additional exit stairway then? The inconsistencies in the record begin to become so extreme as to be mind-boggling. Take this vapid attempt at an excuseHow about assuming any piece without the red markings came from Building 7? Besides, according to the October 21, 2001, New York Times, in " At Landfill, Tons of Debris, Slivers of Solace," by Dan Barry and Amy Waldman,This is the sort of detail that goes awry when conspiracies get too large, and their participants begin to tire. Anyone would think that special attention should be paid to the piles containing CIA and Secret Service records---or Enron and WorldCom files for that matter.The October 2, 2001, New York Times article, "Scarred Steel Holds Clues, And Remedies," quotes Dr. Astaneh-Asl, a professor of structural engineering at the University of California at Berkeley, who was a member of one of eight projects "financed by the National Science Foundation to study the World Trade Center disaster. He is also a member of a team assembled by the American Society of Civil Engineers to investigate the trade center site." Astaneh-Asl literally stumbles out in his nightgown upon a scene of truck loads of steel being secreted out of the city without inspection. And NIST now wants to claim that it all got away from them.Look at the faulty logic in this tacit admission that the main stream media are major participants in the conspiracyWhy didn't NIST demand the unedited sequence from NBC News themselves? We know this crucial evidence exists because it was reveled by the illogical editing.NIST is denying reality when it neglects the multiple references in the written and video records of gun shot blasts and bomb explosions. But NIST is a mess. Listen to them whine