Judicial review is part of the United States' system of checks and balances on government. The Supreme Court has the power to review acts of the Legislative (Congress) and Executive (Presidential) branches to ensure they don't become too powerful or abrogate the Constitutional rights of the country's citizens.
1972 This year is marked as a black year in history due to the use of terrorism entering sport with the massacre of 11 Israel Athletes by Arab Gunman. Also this is the beginning of the biggest political scandal in modern times and the start of the Watergate Scandal.
Once-off holidays. 31 December 1999 and 2 January 2000 were declared public holidays to accommodate the Y2K changeover, and 3 January 2000 was automatically a public holiday because the previous holiday was a Sunday. 2 May 2008 was declared a public holiday when Human Rights Day and Good Friday coincided on 21 March 2008.