Every day, thousands of tons of deadly chemicals are moving through our towns and cities, largely unguarded and vulnerable to a terrorist attack. The government knows that, if attacked, these shipments could cause great harm and many fatalities, but are we doing enough about it? NOW investigates how, nearly five years after 9/11, our trains, boats and trucks carrying hazardous materials could be left so defenseless. Also this week, David Brancaccio sits down with John D. Hutson, a former senior lawyer for the Navy, to talk about the June 29, 2006 U.S. Supreme Court ruling that the Bush administration does not have the authority to try terrorism suspects held at Guantanamo Bay by military tribunal.