My natural reaction to events like this is to write, to create, and many people have already done so. Cartoonists and artists are posting images on twitter at a rate of knots at the moment. I haven't quite got that far yet. I'm still a bit numb. But I've written a number of pieces about this over the years - and I've a new piece coming very soon which is in editing hell - but I think this is the best work I written about self censorship in art. It's called The Project After - and it can be heard here.
When I first presented this piece I also put together a trailer for it and this video sums up the choices we face rather well. It's only a few seconds long. Have a watch.
Finally, my thoughts are with those who lost someone today in these attacks, and with everyone who stands up for freedom of expression, of learning, of thought anywhere in the world.