Before John Kerry was practicing politics, he practiced at being a pop star. Click to hear clips from Kerry's prep school rock band, the Electras

Velina Nurse spent close to two years photographing some of the workers and clients at CAL-PEP's mobile unit in Oakland, Calif., where those in the at-risk community can get free HIV tests. A wide swath of people came by the unit to be tested. Read their stories, and listen to the accompanying audio from the photographer.

Audio portraits on life after the attacks.

In the war on Afghanistan, the U.S. has unveiled its most sophisticated weaponry but there are even more ambitious projects ahead. Learn about the unmanned military weapons that are being used and what we can expect in the future.

An interactive guide to urban warfare