 In 1942, the government erected scaffolding to disguise the building in anticipation of air attacks by the Japanese Air Force.During the India-Pakistan wars of 1965 and 1971, scaffolding was again erected to mislead bomber pilots.More recent threats have come from environmental pollution on the banks of the Yamuna River including acid rain due to the Mathura Oil Refinery, which was opposed by Supreme Court of India directives.