Muslim organisations tend to have a low level of organisation. The communities in Europe are quite diverse.

If information ends up in the wrong hands, the lives of people very often are immediately at risk.

In situations of military conflict, civil strife, lawlessness, bad governance, and human rights violations, terrorists find it easier to hide, train and prepare their attacks.

In intelligence work, there are limits to the amount of information one can share. Confidentiality is essential.

Terrorists have failed in what is arguably al Qaida's most important objective - to trigger revolutions.

The majority of the world's Muslims do not believe that terrorism is a legitimate strategy or that Islam is incompatible with democracy.

Police forces collect information to be used in a public court to get people convicted. Security services gather information that does not necessarily lead to people being prosecuted and in many cases needs to remain confidential.