The 3:40 a.m. attack on Sterling Hall was so powerful, it damaged 26 other buildings. Pieces of the stolen van that contained the ammonium nitrate bomb were found atop an eight-story building three blocks from the blast site.
Howard and his wife were knocked out of bed. Nearby churches lost their windows. Residents 30 miles away were awakened by the sound.
Fassnacht was working through the night to finish a project before leaving on vacation. He planned to go to San Diego the next day with his wife, Stephanie, their 3-year-old son, Chris, and their 1-year-old twin daughters, Heidi and Karin.
Investigators think Armstrong, along with his brother Dwight and accomplices David Fine and Leo Burt, filled a Ford van with fertilizer and jet fuel, drove it to Sterling Hall's loading dock, lighted the fuse and called the police to warn them.
In an interview last week, Armstrong said the attackers had bombed Sterling Hall in the wee hours because they did not want to harm anyone and had assumed the building would be vacant. But Fassnacht was killed and four others injured.