Event:
Flight recorder signals from the missing Malaysia Air jet are no longer detectable; the flight, which disappeared on March 8th, may be located in a zone of over 57,000 square km of water about 2,200 km to the northwest of Perth, Australia
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
