9/11 Truth activists put up a third beam of light on September 11, 2010 alongside the 2, to remind the public that a third building was also destroyed on 9/11: WTC Building 7, the most obvious instance of controlled demolition, with only minor fires, and falling symmetrically into its own footprint at near freefall acceleration

www.ae911truth.org/en/news/41-articles/373-3-beams-for-truth-on-sept-11-2010-.html