January 7, 2003

The Leaning Tower of Pisa was slanting so heavily, it was in danger of falling. Engineers started working to reduce the lean and preserve the tower. Many methods were supplied and used, explains John Burland, a committee member on the project. He talks with Todd about how they extracted soil from under the tower to level it off. He talks about why the Tower had been leaning more over time, and its history. He explains the process they went through to save it, and the end result.

The majority of bus accidents are side collisions, and involve objects between the bus and the curb. Researchers are developing a laser and camera system to alert bus drivers of these obstacles to prevent accidents. Research associate at Carnegie Mellon's Robotics Institute, Christoph Mertz, talks with Todd about the device, and their use in city metro systems.

Todd talks with Anthony Harris, the Director of the Criminal Justice Program at the University of Massachusetts, Amherst, about the reason why America's murder rate is so low today. They discuss Harris's "Ambulance-Homicide Theory"; that life saving technology is outpacing our attempts to kill each other.