1969: John Hancock Center opens as city's tallest building.
1970: First Chicago gay pride parade.
Jesse Jackson forms Operation PUSH.
1971: Union stock yards close.
1972: United Flight 553 crashes near Midway, killing 43 of 61 aboard, and two on ground.
1973: Construction finished on Sears Tower (now Willis Tower), world's tallest building until 1997.
1974: Columbia College fully accredited.
1974: Federal judge rules police department eligibility tests discriminate against blacks, Latinos and women.
1974: David Mamet's play "Sexual Perversity in Chicago" premieres.
1975: Deep Tunnel project begun.
1976: Richard J. Daley dies.
1976: Saul Bellow wins Nobel Prize for literature and Steppenwolf Theater opens.
1977: Elevated train derails in Loop, killing 11 and injuring about 200.
1977: Art Institute installs Marc Chagall's famous windows.
1977: Chicago Marathon debuts.
1978: Demise of Chicago Daily News.
1979: American Airlines Flight 191 crashes, killing 273.
1979: Pope John Paul II holds mass in Grant Park.
1979: Jane Byrne elected city's first female mayor.
1980: Taste of Chicago debuts on North Michigan Avenue.
175 years of memorable, horrible, humorous and remarkable events that shaped Chicago
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