Islamabad is the capital city of Pakistan. It is the country's tenth-most populous city with a population of over 1.1 million; and is federally administered by the Pakistani government as part of the Islamabad Capital Territory — with a metropolitan population of over 2.3 million. Built as a planned city in the 1960s and established in 1967 along the Margalla Hills, Islamabad replaced Karachi as P…