First, and above all, my thoughts are with all those affected by the terrible events in Belgium. I'm so very sorry this has happened.
I think it is notable how quickly the mainstream media suggests who is behind it (this started even before the event - "expect 'revenge attacks' " etc). Facts simply cannot be adequately known at this stage. Certainly there's been no time for any thorough/impartial investigation (not that the impartiality element is likely to ever happen). And yet we're being led quite quickly to certain conclusions ("The attacks come four days after Salah Abdeslam, the main fugitive in the Paris attacks, was seized in Brussels" states the BBC). I'm making no comment about the veracity of these conclusions, but I think they're yet another demonstration of how easy we - the populus - are to lead.