Tyler poison gas plot
The Tyler poison gas plot was an American attempt at domestic terrorism thwarted in April 2003 with the arrest of three individuals in Tyler, Texas and the seizure of a cyanide gas bomb along with a large arsenal that included at least 100 other conventional bombs, machine guns, an assault rifle, an unregistered silencer, and 500,000 rounds of ammunition. The chemical stockpile seized included sodium cyanide, hydrochloric acid, nitric acid and acetic acid.
- William J. Krar, originally from New Hampshire
- Judith Bruey, Krar's common-law wife
- Edward Feltus of Old Bridge, New Jersey
Feltus was a member of the New Jersey Militia. Krar was suspected of making his living travelling across the country selling bomb components and other weapons to violent underground anti-government groups. Federal authorities had their eye on Krar since at least 1995 when ATF agents investigated a possible plot to bomb government buildings, but Krar was not charged. Since the September 11, 2001 terrorist attacks, their attention was focused on middle-eastern terrorist activities and were only alerted to Krar's recent activities by accident when he mailed Feltus a package of counterfeit birth certificates from North Dakota, Vermont and West Virginia, and United Nations Multinational Force and Defence Intelligence Agency IDs. The package was mistakenly delivered to a Staten Island man who alerted police.
On May 4, 2004 Krar was sentenced to 135 months in prison after he pled guilty to building and possessing chemical weapons. Ms. Bruey was sentenced to 57 months after pleading to "conspiracy to possess illegal weapons." 
- Riggs, Robert (Nov 26, 2003). "WMD Plot Uncovered In East Texas".
- "Feds: What did Texas couple plan to do with cyanide?". USA Today. January 30, 2004.
- "US DOJ: PRISON SENTENCE FOR POSSESSING CHEMICAL WEAPONS" (PDF). May 4, 2004.