<p><b>Bogot&#225; Change</b></p><p>Ridden with crime and drugs, Bogot&#225; was once considered one of the most dangerous cities in the world. Then Antanus Mockus - a man fired from his university job for mooning his students in a fit of rage - was elected mayor, and turned the city into a model for the rest of the world; a rare example of the power of politics to effect change for the better.</p>