McVeigh's anti-government rhetoric became more radical. He began to sell Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) hats riddled with bullet holes, and a flare gun that he said could shoot down an "ATF helicopter". He produced videos detailing the government's actions at Waco and handed out pamphlets with titles such as "U.S. Government Initiates Open Warfare Against American People" and "Waco Shootout Evokes Memory of Warsaw '43." He began changing his answering machine greeting every couple of weeks to various quotes by Patrick Henry, such as "Give me liberty or give me death." He began experimenting with making pipe bombs and other small explosive devices. The government imposed new firearms restrictions in 1994 which McVeigh believed threatened his livelihood.