http://www.dailystar.co.uk/news/latest-news/330402/Terror-threat-to-British-embassies
But John Pistone, head of America’s Transportation Security Administration, revealed at a global security summit that the terrorist’s latest devices were “highly sophisticated and much harder to detect”.
According to Mr Pistone, al-Asiri’s latest attempt to blow up a commercial US jet last year involved an explosive “that we had never seen before, and that no machine or dog had been calibrated or trained to detect”.
He added that al-Asiri, a Saudi believed to be in Yemen, has also developed a “double initiation system” for his bombs, using two detonators instead of one.
http://uk.reuters.com/article/2013/07/20/uk-usa-yemen-bombmaker-idUKBRE96J01W20130720
Saudi suspect in underwear bomb plots trained others, U.S. says
http://swampland.time.com/2013/07/19/beware-underwear-2-tsa-chief-offers-rare-al-qaeda-bomb-details/
Beware “Underwear: TSA Chief Offers Rare al Qaeda Bomb Details
A “next generation” device that could have slipped past airport security, and the evil genius behind it
They have had the bomb at Quantico since last May.
It is encased in caulk in an effort to trap vapors that might alert any bomb-sniffing machines or dogs that did happen to be capable of identifying the explosive.and is totally non-metallic.
The only reason the plot was foiled:
"The suicide bomber dispatched by the Yemen branch of Al Qaeda last month to blow up a United States-bound airliner was actually an intelligence agent for Saudi Arabia who infiltrated the terrorist group and volunteered for the mission, American and foreign officials said Tuesday. " Source
I just cannot fathom the mentality of someone who wants to blow himself up starting from the crotch. Boggles my mind entirely.
Just as an added note.... there are also concerns of devices planted “in the body” which appear to escape detection. Their love of death and destruction knows no boundaries!