Washington, April 26: Stating that New Delhi's "overconfidence" about its ability to keep its nuclear weapons and materials from falling into terrorist hands could be misplaced, a report by US policymakers and think-tanks has warned that the country's multi-ethnic society may pose a serious danger to its arsenal. "India is a multi-ethnic society with the world's second-largest Muslim population, and Arab fighters could blend into Indian society," the report, prepared during a conference in Washington by the NGO Stanley Foundation of IOWA, said. The vulnerability of Indian nuclear weapons or material to theft or diversion was an "overlooked" matter, it...