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Pakistan President Asif Ali Zardari, center, waves while arriving at the Palam Airfield with his son Bilawal Bhutto Zardari, second left in front, in New Delhi, India, Sunday, April 8, 2012. Zardari arrived in India on a private trip Sunday that also gives him a chance to meet Indian leaders amid a thaw in relations between the two South Asian rivals. (AP Photo/Saurabh Das) Saurabh Das/AP