After the scenes of jubilation yesterday when the decision on the 2012 Olympic Games was announced, it was quite a different story this morning. When I arrived at work the television in the tea room was on and a lot of people were watching the pictures coming from the scenes of today's explosions. As yet, no one knows who is responsible for them, or how many casualties there are as central London has effectively come to a stand still. We are especially worried here as most of the pulsar group are currently in London taking part in an exhibition at the Royal Society. I tried calling Dave to find out if they are all ok but either his phone is switched off, or there is too much load on the system.