The notorious "Speedway Bomber" served 17 years in prison for his crimes but is now a left-wing activist Convicted terrorist bomber Brett Kimberlin was revealed this week to have worked with shady Democrat operative Alexandra Chalupa in a campaign to discredit President Trump. “That work culminated in a Washington, D.C. meeting in December between” Chalupa, “Speedway Bomber” Kimberlin, and a South Africa-born Israeli man identified as Yoni Ariel, the Daily Caller reported.