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Photo by: Majid Asgaripour

FILE - In this Oct. 26, 2010 file photo, a worker rides a bicycle in front of the reactor building of the Bushehr nuclear power plant, just outside the southern city of Bushehr, Iran. Assassinations, cyber-attacks and possible military strikes: As nuclear negotiations with Iran enter a crucial stage, Tehran is voicing fears that tougher oversight of its activities will increase the risks of an attack on its atomic facilities and the scientists working on them. (AP Photo/Mehr News Agency, Majid Asgaripour, File)

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