COLOMBO (Reuters) -- Sri Lankan housewife Fathima Fazla thought of her neighbours in the grand three-storey home across the street as the wealthy celebrities of her humble Colombo suburb. She had no idea how infamous they would become. A person mourns at a grave of a victim, two days after a string of suicide bomb attacks on churches and luxury hotels across the island on Easter Sunday, at Sellakanda Catholic cemetery in Negombo, Sri Lanka April 23, 2019. REUTERS/Athit Perawongmetha Two brothers who lived at the white house on Mahawela Gardens have emerged as key players in suicide attacks on...