What Happened on April 20, 1973

• Canadian ANIK A2 becomes 1st commercial satellite in orbit
• Mass murderer Ed Kemper attempts to dispose of his mother's vocal chords in a domestic waste disposal unit

• Geoff Lloyd, British radio presenter (Geoff Lloyd with Annabel Port), born in Withington, Lancashire, England
• Isabel Dos Santos, Angolan businesswoman, daughter of ex-President José Eduardo dos Santos, Africa's richest woman, born in Baku, Azerbaijan SSR
• Itula Mili, NFL tight end (Seattle Seahawks), born in Kahuku, Hawaii
• Lamond Murray, American basketball forward (LA Clippers), born in Pasadena, California
• Todd Hollandsworth, American baseball outfielder (World Series 2003 Florida Marlins; NL Rookie of the Year 1996 LA Dodgers), born in Dayton, Ohio

• Elisabeth Hauptmann, German writer (co-author of The Threepenny Opera), dies at 75
• Hans Kelsen, Austrian legal philosopher and political philosopher, dies at 91
• Robert Armstrong, American actor (Mighty Joe Young, King Kong), dies at 82

Holidays: Good Friday (Australia, Canada, New Zealand, United Kingdom)

• #1 Song: Tie A Yellow Ribbon Round The Ole Oak Tree - Dawn Featuring Tony Orlando
• #1 Song: Tie A Yellow Ribbon Round The Old Oak Tree - Dawn Featuring Tony Orlando