My mate Kath is in Barcelona at the moment and sent this though in an email:
The anti war demo here was pretty cool. There were 1.5 million people I think. I heard London had 2 million. I donīt know about Paris. They sort of continued into yesterday with a huge street parade of dancing dragons that had catherine wheels and rockets attached to them. There were sparks and explosions everywhere. The parade went thru the narrow streets of old city. There was so much smoke from the gun powder that you could hardly see the figures at times. It was actually quite scary… but fun.