The growth of 'online Jihadism'
By Frank Gardner
BBC Security Correspondent, Norway

Housed in a shallow valley just outside Oslo is the Norwegian Defence Research Institute.

It is an unremarkable place to look at, but inside sits one of Europe's leading teams of researchers into the growing phenomenon known as "online Jihadism", or al-Qaeda-inspired extremism on the internet.

They are neither intelligence agents nor soldiers, but academics who use their fluent Arabic to produce unclassified research.

Like many who study this subject, they disguise their real identity by using false Arabic names and proxy addresses. the rest