ABC’s “In an Instant”, a series of 2-hour documentary films sponsored by 20-20, aired
“Terror in the Library” (link) Saturday June 24, about an event March 5, 1994, when Clifford Lynn Draper took hostages and threatened to block himself and the hostages up if many demands related to his military service were not met.
The perpetrator was said to be a paranoid schizophrenic. He was finally shot by an off-duty policeman who used specific intelligence to decide when to act.
Incidents like this have happened (before 9/11), from non-islam-related causes more often that people realize. The most notorious was he kidnapping of Patty Hearst in 1974.
This is particularly disturbing to me, as I have outlined here.
The Salt Lake Tribune has a detailed story here.