Nuclear terrorism top threat to US: Obama

The White House has announced a fundamental shift in America’s nuclear strategy, calling the spread of atomic weapons to rogue states or terrorists a worse threat than the nuclear Armageddon feared during the Cold War.

Releasing the results of an in-depth nuclear strategy review, President Barack Obama said his administration would narrow the circumstances in which the US might launch a nuclear strike, that it would forgo the development of new nuclear warheads and would seek even deeper reductions in American and Russian arsenals.