Title: Obama: Nuclear Terrorism Is 'The Single Biggest Threat' To U.S.Date: April 11, 2010Source: USA TodayAbstract: The single biggest threat to U.S. security, both short-term, medium-term and long-term, would be the possibility of a terrorist organization obtaining a nuclear weapon???We know that organizations like al-Qaeda are in the process of trying to secure nuclear weapons or other weapons