VIDEO: Iranian nuclear scientist killed; Doomsday Clock ticks toward midnight

The Takeaway

Another Iranian nuclear scientist has been killed in an assassination and Iranian officials are pointing fingers at Israel and perhaps the United States.

Gordon Corera, security correspondent for our partner the BBC, said there's no doubt there's a quiet campaign underway in Iran now to try and subvert the country's efforts to develop nuclear weapons. Signs are slowly coming forward. There's the Stuxnet worm that targeted centrifuges, of course. And the American drones that have been flying over the country, including one that was captured. But Wednesday morning, it became clear that there's a direct approach underway as well. Mostafa Ahmadi Roshan was killed when a magnetic bomb was attached to his car by a speeding motorcyclist.

Roshan is the fourth Iranian nuclear scientist to be assassinated in the past two years — typically by assassins using a similar method. He was a chemical expert and a director of the Natanz uranium enrichment facility. 

Iran Says Bomb Killed Nuclear Expert
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