Information and pictures retrieved from following sites on 08/25/13:
http://www.history.com/this-day-in-history/pluto-discovered
http://kclibrary.lonestar.edu/decade30.html
http://www.history.com/this-day-in-history/empire-state-building-dedicated
http://www.janecky.com/olympics/wintergames/1932w.html
http://www.loc.gov/exhibits/treasures/trm065.html
http://www.greatbuildings.com/buildings/Golden_Gate_Bridge.html
http://www.greatbuildings.com/buildings/U.S._Supreme_Court.html
http://www.monopolycollector.com/
http://www.history.com/this-day-in-history/pluto-discovered
http://kclibrary.lonestar.edu/decade30.html
http://www.history.com/this-day-in-history/empire-state-building-dedicated
http://www.janecky.com/olympics/wintergames/1932w.html
http://www.loc.gov/exhibits/treasures/trm065.html
http://www.greatbuildings.com/buildings/Golden_Gate_Bridge.html
http://www.greatbuildings.com/buildings/U.S._Supreme_Court.html
http://www.monopolycollector.com/