It was challenged in the courts on the ground that it violates fundamental rights.
It was challenged because it cut off before the theoretical repository would release its largest doses.
It was challenged once again and invalidated by the three-judge district court on summary judgment.
It was challenged last month in the journal Nature by the Harvard biologist E. O. Wilson and two colleagues.
It was challenged in court, and a judge allowed the ban to begin on Oct. 1 despite the pending lawsuit.
It was challenged by Chris Hedges, a journalist who interacts with terrorists as part of his reporting, and by several prominent supporters of WikiLeaks.
It was challenged by a group of travel agents who said the requirement would force them to raise prices and could drive them out of business.
It was challenged by the tenant, under the Tenancy Deposit Protection Scheme, who argued the Wilsons were aware she had three children when she moved in and that they caused only a reasonable amount of wear and tear.
It was challenged and upset by Arendt's interpretation of the history of Nazism in Origins.
It was challenged by the state but upheld by the state Supreme Court, and overturned by a federal court following a private legal challenge.
It was challenged by Edith "Edie" Windsor, 83, when the Internal Revenue Service stuck her with $363,000 of estate taxes after her late wife died.
