Event:
Groundbreaking on Philadelphia's Shibe Park (home of A's and Phillies)
More Notable Events on April 13:
1983 Harold Washington elected 1st black mayor of Chicago
1980 U.S. boycotts Summer Olympics in Moscow
1943 Franklin D. Roosevelt dedicates Jefferson Memorial
1933 1st flight over Mount Everest by Lord Clydesdale
1870 Metropolitan Museum of Art forms in New York City
