London Attackers Slipped By Despite an Avalanche of Warnings<br />Usama Hasan, a former Islamic extremist who now works with the police to help de-radicalize others, said he had<br />a physical altercation in a London park less than a year ago with one of the assailants, Khuram Shazad Butt.<br />Butt alongside other Muhajiroun members sparring with the police, who were called to a London park where the<br />men had unfurled an Islamic State flag, said Ishtiaq Ahmed, whose brother worked at the same restaurant.<br />Jesse Morton, a former Al Qaeda recruiter who became an informer, knew the London attacker Khuram Shazad Butt and flagged him to the F.B.I.<br />Meanwhile, in Italy, the authorities allowed the second attacker, Youssef Zaghba, to walk past them<br />last year at an airport security check, even though he was carrying Islamic State propaganda.<br />" he wrote. that Could you please confirm that my assailant in the above case (CAD 7943 06JUL16)<br />is the same Khuram Butt who was one of the London Bridge terrorists over the weekend?<br />Butt, the most detailed account was offered in an interview on Tuesday with Mr. Hasan, the member of the network of former extremists<br />and the head of Islamic studies at the Quilliam foundation.<br />LONDON — Islamic State propaganda had been found in the bag of one attacker while he was trying to board a flight in Italy.<br />He was traveling on a one-way ticket, and the authorities found Islamic State material on one of his electronic devices, said two former<br />European intelligence officials, who spoke on the condition of anonymity because they were not authorized to discuss the matter.
