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PARIS — A day after the terror attacks in Mumbai that killed over 100 people, one question remained as impenetrable as the smoke that still billowed from two of the city's landmark hotels: who carried out the attacks? The Indian authorities say they captured some of the attackers, so some answers may emerge soon. But for now, their identities remain a mystery. Surviving witnesses recalled the gunmen as masked young men in unremarkable T-shirts and jeans, some heavily armed, wearing backpacks filled with weapons. The only claim of responsibility came from a group that may not even exist. The assaults represented a marked departure in scope and ambition from other recent terrorist attacks in India, which have singled out local people rather than foreigners and hit single rather than multiple targets. The Mumbai assault, by contrast, was seemed directed at foreigners, involved hostage taking and was aimed at multiple and highly symbolic targets. Indian Prime Minister Manmohan Singh o...