NIST exploring 9/11 "blast events" for WTC-7

"A new eyewitness inside WTC-7 on the morning of 9/11 heard explosions before either of the Twin Towers collapsed. He was summoned to the Office of Emergency Management Operating Center (OEMOC), also known as "Rudy's Bunker," on the 23rd floor of the building. The center had been especially prepared for the Mayor and other officials to gather in case of a terrorist attack or other emergency. Some have wondered why Giuliani did not go to the OEMOC but instead remained some distance from the World Trade Center."