According to a British intelligence report leaked to the press in 2007, al Qaeda operatives are planning a large-scale attack 'on par with Hiroshima and Nagasaki'. How likely is it that terrorists will develop the capability of such an attack? No one understands the nature of the threat posed by nuclear terrorism better than Brian Michael Jenkins - one of the world's most renowned experts on terrorism. For more than thirty years, he has been advising the military, government, and prestigious think tanks on the dangers of escalating terrorism. Jenkins goes beyond what the experts know about terrorists' efforts to acquire nuclear weapons, nuclear black markets, 'suitcase bombs', and mysterious substances like red mercury to examine how terrorists themselves think about such weapons. Jenkins' informed and seasoned analysis will give all Americans a level-headed understanding of the real situation and teach us how not to yield to nuclear terror.