WASHINGTON – While Israel has formally refuted allegations it was involved in the assassination of Hizbullah 'operations officer' Imad Mugniyah in Damascus on Tuesday, former CIA official Bruce Riedel says all signs seem to indicate the Mossad was behind the killing. Riedel, who spent over 30 years with the CIA before serving as a senior advisor on South Asian and Middle East affairs under three US presidents, said Israel has already carried out similar operations in Syria Currently a senior fellow with the Saban Center for Middle East Policy at the Brookings Institute, he says Mugniyah's assassination proves Israel has...