Controlled explosion of WWII bomb

Unexploded WWII bomb is detonated. Workers clearing land for the 2012 London Olympics found a 1000 kilogram WWII bomb – it took days to make the site safe, a job that was made particularly difficult when the thing started ticking. To make things worse, it was next to a gasworks. The team of experts from the Royal Engineers were eventually able to ’safely’ detonate the thing, although this doesn’t look like a particularly controlled or safe explosion to me…