Richard Clarke, former chief of counter-terrorism for the Clinton White House and participant on the Brennan call said on ABC's Nightline there was a Western spy or double-agent in on the plot.
This vindicates Kurt Haskell, a passenger on that flight, who stated from the beginning he saw Abdulmutallab walked through airport security and airline security at the gate by without a passport by a "sharp dressed man." So we know what one of the double-agents looks like. And surprise, surprise - the airport's security video footage from that day is lost.
The whole-body scanners (aka naked body scanners) were rolled into airports on the heels of this story.
The news, when it had a negative slant on this story which wasn't often, focused on who was getting rich from this deal: Michael Chertoff.
From Mother Jones on January 4, 2010:
Yet the rush toward full-body scans already seems unstoppable. They were mandated today as part of the "enhanced" screening for travelers from selected countries, and hundreds of the machines are already on order, at a cost of about $150,000 apiece. Within days of the bombing attempt, Reuters was reporting that the "greater U.S. government shift toward using the high-tech devices could create a boom for makers of security imaging products, and it has already created a speculative spike in share prices in some companies."
Which brings us to the money shot. The body scanner is sure to get a go-ahead because of the illustrious personages hawking them. Chief among them is former DHS secretary Michael Chertoff, who now heads the Chertoff Group, which represents one of the leading manufacturers of whole-body-imaging machines, Rapiscan Systems. For days after the attack, Chertoff made the rounds on the media promoting the scanners, calling the bombing attempt "a very vivid lesson in the value of that machinery"—all without disclosing his relationship to Rapiscan.
And there it is. When there's something a government wants to do and the bad guys won't cooperate by doing something, anything to permit the government to respond to, they just go ahead and do it and pin it on some guy, group, or nation.