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US Defence Secretary Leon Panetta (R) shakes hands with Egyptian military figures before the start of a meeting with military ruler Field Marshal Hussein Tantawi (R) in Cairo October 4, 2011 during the former's official visit that aims to defuse tensions between Egypt and Israel that have mounted since the end of Hosni Mubarak's rule. AFP PHOTO/POOL/MOHAMED ABD EL-GHANY (Photo credit should read Mohamed Abd El-Ghany/AFP/Getty Images)

US Defence Secretary Leon Panetta (R) shakes hands with Egyptian military figures before the start of a meeting with military ruler Field Marshal Hussein Tantawi (R) in Cairo October 4, 2011 during the former's official visit that aims to defuse tensions between Egypt and Israel that have mounted since the end of Hosni Mubarak's rule. AFP PHOTO/POOL/MOHAMED ABD EL-GHANY (Photo credit should read Mohamed Abd El-Ghany/AFP/Getty Images)