In this photo provided by the International Iran Photo Agency, Iranian security forces stand guard around the site of an explosion outside a university in Tehran, Iran, Wednesday, Jan. 11, 2012. Two assailants on a motorcycle attached magnetic bombs on Wednesday to the car of an Iranian university professor working at a key nuclear facility, killing him, the driver and wounding one other. (AP Photo/IIPA, Sajjad Safari)
Read the article: Iranian nuclear expert killed by covert bomb effort
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