NOVA: The Bombing of America - PBS

ORIGINALLY AIRED April 16, 1996
On NOVA, Oklahoma City, the World Trade Center, a suspect in the UNABOM case. Bombing is on the rise across the United States. But science is fighting back. Hidden within the chaos of a crime scene lie clues that can solve the case. Can science help stop the "Bombing of America"?

This examination of the role science plays in fighting bombing incidents in the United States focuses on the Unabomber incidents and the World Trade Center bombing.

https://www.pbs.org/wgbh/nova/bombing/