US intelligence and security services are under fire after reports they knew months ago that a Nigerian man in Yemen was being prepared to carry out a terror attack.
That failure to stop an extremist from boarding a plane with explosives on Christmas Day could have easily cost nearly 300 lives.
Meanwhile, the investigation into Umar Farouk Abdulmutallab's background is intensifying. Tonight in London, authorities are looking into his time as a college student, which is when he appears to have become immersed in radical politics.
His four years in London were privileged. An expensive apartment, a place at one of the best colleges in the world. While there, he became president of the Islamic Students Association.
In 2007, Abdulmutallab organized a 'War on Terror' week, where speakers assailed Guantanamo Bay and the Iraq War, but never, his friends insist, advocated violence.
Despite more recent efforts to crack down, extremists still have surprising ability to get their message out in the UK. one radical preacher was scheduled to speak at Abdulmutallab's former college next week, until the event was abruptly cancelled.
Muslim campus groups now fear a broad crackdown on freedom of expression.
Off-campus, Abdulmutallab visited a London mosque, which hosted speakers like Anwar al-Awlaki, the radical cleric who communicated with the alleged Ft Hood shooter. Officially, the topic of his talk was the afterlife, but the flier showed images of New York seemingly under attack.
British officials say it is still not certain Abdulmutallab was radicalised in the UK. They are also closely examining his last visit to Yemen, where he studied Arabic, but then disappeared for two months before the one-time student left on a mission to kill Americans.