Six Metro stations in the heart of New Delhi will be closed for most part of Sunday, an apparent precautionary step by the authorities following a call by India Against Corruption (IAC) to gherao residences of Prime Minister Manmohan Singh and BJP president Nitin Gadkari over the coal block allocation issue. A Delhi Metro spokesman said Central Secretariat, Udyog Bhawan, Patel Chowk, Race Course, Jor Bagh and Khan Market stations...