North Korea's apparent test of a nuclear device could have a devastating effect on the world's long struggle to contain the spread of the most powerful military weapon known to man.
U.S. President Bush announced a new initative to support the development of fuel cell powered vehicles but critics argue that commercial viability is still far off.
Peter Grier examines what effect nuclear deterrence has had on defusing the conflict between India and Pakistan.
A detailed overview of the known attempts that al Qaeda operatives have made to acquire nuclear weapons or material.