There's been an uproar in Britain, after a newspaper obtained a videotape of an incident in 2003 when U.S. pilots opened fire on a tank in Iraq killing a British soldier. Guests discuss why friendly fire happens, and if it can be prevented.
Julian Borger, reporter, the Guardian
Claire Leger , mother of Canadian soldier Sgt. Marc Leger, who was killed by friendly fire in Afghanistan
Sarah Sewell, director of Carr center for human rights policy at Harvard