The world's Terror Network has been given a new weapon. It can overcome the most stringent of airport and airline security checks. Far more lethal than Semtex, it can be smuggled with virtual impunity from one country to another, one terrorist cell to another. For the 80 terror groups listed on the computers of the CIA, MI5, MI6 and Germany's BND, the weapon once more tips the scales in their favour. It is a new type of plastic explosive that was used by the two young British radical Muslims in last week's suicide bomb attack on the club in Tel...