The involvement of Muslim physicians in the London and Glasgow airport terror conspiracy on June 29-30, 2007, forced both non-Muslims and moderate Muslims to question how those trained to heal could embrace terrorism. The doctors involved in the attempt to detonate car bombs in London and blow up a passenger terminal at the Glasgow airport did not represent an isolated phenomenon. Many Muslim doctors have adopted the extremist doctrines espoused by the Muslim Brotherhood, Saudi Wahhabis, and Pakistani jihadists. Groups such as Al-Muhajiroun, a group banned but still active in Britain and famous for celebrating the 9-11 terror attacks,...