Event:
"David Letterman Show," debuts on NBC-TV daytime
More Notable Events on June 23:
1996 Nintendo 64 goes on sale in Japan
1986 Tip O'Neill, Representative-D-Massachusetts, refuses to let Reagan address House
1976 CCN Tower in Toronto, tallest free-standing structure, 555 m, opens
1956 Gamal Abdel Nasser elected president of Egypt
1860 U.S. Secret Service created
