No. 6: O.J. Simpson White Bronco Chase

TV's Most Memorable Moments

A white Ford Bronco, driven by Al Cowlings and carrying O.J. Simpson, is trailed by police cars as it travels on a southern California freeway on June 17, 1994, in Los Angeles. Cowlings and Simpson led authorities on a chase after Simpson was charged with two counts of murder in the deaths of his ex-wife and her friend.

(AP Photo)

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Top 20 Most Memo... What are the most memorable moments of television over the last half century?

The final episode of "M-A-S-H"?

The Beatles' appearance on "The Ed Sullivan Show"?

Or that famous "Who shot J.R.?" episode of "Dallas"?

None of those even come close, actually.

These are the 20 most impactful television events of the last 50 years, as measured in a survey conducted by Nielsen and Sony Electronics. The rankings are based on a questionnaire of consumers about events they had watched, if they remember where they were and if they discussed the events with others.

Take a look. You might be surprised, but chances are you'll remember plenty of these events.

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No. 20: John F. ... Three-year-old John F. Kennedy Jr. salutes his father's casket in Washington in this Nov. 25, 1963 file photo, three days after the president was assassinated in Dallas.

(AP Photo)

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No.19: Casey Ant... Casey Anthony holds hands with her defense attorney, Jose Baez, as they listen to the verdict at the Orange County Courthouse in Orlando, Fla., Tuesday, July 5, 2011. The jury acquitted Anthony of murdering her daughter, Caylee.

(AP Photo)

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No. 18: L.A. Rio... A Korean shopping mall burns at Third Street and Vermont Avenue in Los Angeles in this 1992 file photo taken on the second day of rioting following the Rodney King beating.

(AP Photo)

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No. 17: Disputed... Broward County canvassing board member Judge Robert Rosenberg uses a magnifying glass to examine a disputed ballot at the Broward County Courthouse in Fort Lauderdale, Fla., in this Nov. 24, 2000 file photo.

(AP Photo)

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No. 16: Oklahoma... Rescue workers stand together in front of the rubble of the Alfred P. Murrah Federal Building in Oklahoma City during a memorial service, May 5, 1995 to remember those killed in the April 19, 1995, car bombing attack.

(AP Photo)

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No. 15: JFK Assa... This Nov. 22, 1963 file photo shows President John F. Kennedy riding in motorcade with first lady Jacqueline Kenndy before he was shot in Dallas, Texas.

(AP Photo)

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No. 14: William ... This April 29, 2011 file photo shows Prince William and Catherine, the Duchess of Cambridge, walking down the aisle at Westminster Abbey following their marriage in London.

(AP Photo)

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No. 13: Obama's ... This Nov. 4, 2008 file photo shows President-elect Barack Obama smiling during his acceptance speech at Grant Park in Chicago.

(AP Photo)

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No. 12: Saddam's... This video image released by Iraqi state television shows Saddam Hussein's guard wearing a ski mask and leading the deposed leader to the gallows moments before his execution Saturday Dec. 30. 2006.

(AP Photo)

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No. 11: Whitney ... A flower car leads the hearse with Whitney Houston's casket after her funeral at New Hope Baptist Church in Newark, N.J., Saturday, Feb. 18, 2012.

(AP Photo)

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No. 10: Princess... This Sept. 6, 1997 file photo shows the casket containing the body of Diana, Princess of Wales, as it is carried into Westminster Abbey by soldiers of the Welsh Guards, during funeral ceremonies in London.

(AP Photo)

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No. 9: The BP Oi... In this April 21, 2010, file photo, the Deepwater Horizon oil rig burns in the Gulf of Mexico.

(AP Photo)

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No. 8: Columbine... This April 28, 1999 file photo shows an unidentified woman with 15 crosses posted on a hill above Columbine High School in Littleton, Colo. Wednesday, April 28, 1999 in remembrance of the 15 people who died during a school shooting on April 20.

(AP Photo)

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No. 7: Japan's E... This March 12, 2011 file photo shows smokes rising from burning homes in Yamadamachi in Iwate Prefecture, northern Japan a day after a strong earthquake triggered a devastating tsunami in the area.

(AP Photo)

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No. 6: O.J. Simp... A white Ford Bronco, driven by Al Cowlings and carrying O.J. Simpson, is trailed by police cars as it travels on a southern California freeway on June 17, 1994, in Los Angeles. Cowlings and Simpson led authorities on a chase after Simpson was charged with two counts of murder in the deaths of his ex-wife and her friend.

(AP Photo)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.
No. 5: Osama bin... In this Sunday, May 1, 2011 file photo, a driver and passengers celebrate the death of Osama bin Laden in the streets of Lawrence, Kan., President Barack Obama announced May 1, 2011, that Osama bin Laden was killed in an operation led by the United States.

(AP Photo)

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No. 4: Challenge... In this Jan. 28, 1986 file photo, the space shuttle Challenger explodes shortly after lifting off from the Kennedy Space Center in Cape Canaveral, Fla.

(AP Photo)

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No. 3: O.J. Simp... This Oct. 3, 1995 file photo shows O.J. Simpson, center, with defense attorneys F. Lee Bailey, left, and Johnnie Cochran after Simpson was found not guilty of murdering his ex-wife Nicole Brown Simpson and her friend Ron Goldman at the Criminal Courts Building in Los Angeles.

(AP Photo)

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No. 2: Hurricane... New Orleans residents wait to be rescued from the floodwaters of Hurricane Katrina Wednesday, Aug. 31, 2005 in New Orleans.

(AP Photo)

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No. 1: 9/11 Terr... In this Sept. 11, 2001, file photo, the twin towers of the World Trade Center burn behind the Empire State Building in New York. The Sept. 11, 2001 terrorist attack is by far the most memorable moment shared by television viewers during the past 50 years.

(AP Photo)

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