Nuclear Weapons

Pyongyang's threats may sometimes be hollow, but the nuclear ambitions of the reclusive state cause international alarm.
On March 1st, 1954, the U.S. conducted its largest hydrogen bomb test ever near the Bikini Atoll in the Marshall Islands.
Fortunately, experts aren't convinced that North Korea really tested one.
Some experts doubt the latest saber-rattling claim.
The Hawaii Democrat has been a persistent critic of Obama's foreign policy.
A spokesman for Russian President Vladimir Putin said the plans should not have been aired.
"In the age of the Islamic State, it's especially terrifying to have real smugglers of nuclear bomb material apparently making connections with real buyers."
An expert explains why we've been here before, and how to break the cycle.