New Delhi, May 03: Prime Minister Atal Bihari Vajpayee today met his ailing sister Urmila Mishra in the All India Institute of Medical Sciences (AIIMS) here, PMO sources said. Urmila, 72, is undergoing treatment for cancer. The Prime Minister, who had visited Gwalior earlier this week to see his sister, brought her here on April 28 for further treatment. Bureau Report