AbdulMutallab also attended two seminars organized by the Al Maghrib Institute in London in the months before the event in Houston, Qadhi said.
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The Al Maghrib Institute has chapters in the United States, Canada and the United Kingdom, and has taught more than 30, 000 young Muslims in its courses.
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After the Houston event, AbdulMutallab did not sign up for any more Al Maghrib events, said Qadhi -- perhaps a sign he was starting to become influenced by extremist ideas, he added.