6:47 a.m. September 11, 2001: WTC Building 7 Alarm Not Operating

According to later reports, the alarm system in WTC 7 is placed on “TEST” status for a period due to last eight hours. This ordinarily happens during maintenance or other testing, and any alarms received from the building are generally ignored. [National Institute of Standards and Technology, 6/2004, pp. 28 ]