Event:
Caterpillar, a heavy construction equipment manufacturer, announces plans to lay off 300 additional employees at its Decatur, Illinois facility by July 2013
More Notable Events on May 3:
1997 Garry Kasparov begins chess match with IBM supercomputer Deep Blue
1979 Margaret Thatcher becomes the 1st woman prime minister of Great Britain
1973 Chicago's Sears Tower, world's tallest building finished
1952 1st landing by an airplane at geographic North Pole
1802 Washington D.C. incorporates as a city
