In April, 2004, the BACnet committee toured a NIST facility. Part of the tour covered the Building and Fire Research Laboratory, and we glimpsed some of the twisted metal beams from the World Trade Center after it collapsed on September 11, 2001, in New York. It was a very solemn moment for all of us.

World Trade Center steel beams at NIST World Trade Center steel beams at NIST World Trade Center steel beams at NIST

World Trade Center steel beams at NIST World Trade Center steel beams at NIST World Trade Center steel beams at NIST