AIDS: History of a Plague

The AIDS pandemic didn't just happen overnight. The disease, which probably made the leap to humans in the late 19th or early 20th century, had decades of neglect, ignorance, irresponsibility, and homophobia in which to ferment before becoming one of the greatest and most widespread threats humanity has ever faced. See how a little-known illness from the African bush became a pandemic with a death toll -- now 25 million, and counting -- that rivals our longest, costliest, and bloodiest wars.