Cool Video about Engineering of Olympic Venues in London

The Institute of Civil Engineers posted a video about the engineering of venues at the Olympics and the massive infrastructure needed to support them.  To build anything in a city as populous, large, crowded and ancient as London is a challenge.  To redevelop a large area near the center of such a city with a lot of large, sometimes innovative structures and rebuild most of the infrastructure around them is enormously impressive.  Take a look.