by user Dannyjnorman SAN MARCOS, TX. 1 AUGUST 2009. A nuclear explosion set off Al Qaeda terrorists in the University of Texas Tower destroyed over half of Austin and killed well over 100,000. Estimates of the dead range as high as 500,000. Nuclear physicists estimate the device in the 10 to 20 kiloton range, which is about the size of devise the United States used on Hiroshima during World War II. From Free Thinking Americans __NOEDITSECTION__ From The Opinion Wiki, a Wikia wiki. From The Opinion Wiki, a Wikia wiki.