Europe has a long and tragic history of mostly domestic terrorism.

We still lack a global definition of terrorism.

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.

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

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

We remain vulnerable.There is no such thing as 100 percent security against terrorism.

The central role in the fight against terrorism is with national authorities.