The video of the Kennedy assassination that shudders us.

Fifty years ago today, President John F. Kennedy died, a stunned nation grieved and a million conspiracy theories were born.

It was just after noon local time on Nov. 22, 1963, when the limousine carrying Kennedy entered Dealey Plaza in Dallas, its bubble top down so a smiling president, riding in the back seat with First lady Jackie Kennedy, could wave to an adoring crowd. The boyish president, a World War II Navy hero, author and former U.S. senator from Massachusetts, was not quite three years into his first term as commander-in-chief.

Suddenly, as the 1961 Lincoln convertible entered Dealey Plaza, shots rang out from the Texas School Book Depository at 12:29 p.m. In the grainy, yet indelible image caught on the amateur footage that would come to be known as the Zapruder film, Kennedy’s head snaps forward and he slumps next to the horrified first lady. Kennedy, who had insisted on the limo being uncovered, had also directed Secret Service agents to ride in the car behind him. After he was shot, they can be seen on the film scrambling to the back of the limo.

In 26.6 seconds and 486 tables, Abraham Zapruder captured the most precise and clear pictures of the assassination of U.S. President. Today it is the 50th anniversary of KJFK's assassination.  Here you can see the video:

http://www.youtube.com/watch?v=C7rLYh52fPE

He set the camera on, just as the presidential motorcade was spinning. He watched the police motorcycle and the Lincoln convertible was moving slowly while JFK greeted with calm and patient to the people who were waiting for him. Beside him was the first lady, Jackie. In front of him was the governor of Texas, John Connally and his wife.

10 seconds later, he sees that Kennedy does a strange gesture with the body. Jackie turns to him and takes his arm. It is the time when the first shot reaches the president. First lady leaned forward, as if he was about to fall. Shortly after, he received another shot that literally made ​​his head explode. Desperate, Jackie climbs into the trunk of the car with the intention of approaching a security man. The Lincoln accelerates and disappears.

Zapruder quickly contacted an agent of the secret service of Dallas. They ran into a laboratory. Six hours after the assassination, a Kodak photo-shop gave them the film. Three copies were made. One, for the author. The other two, for the Secret Service, which were sent to Washington DC.

The events that followed played out like a real-time drama. In the frenzied aftermath of the shooting, Oswald scurried out of the depository and boarded a bus. Police had a description of the shooter from a witness who had heard the shots and looked up to see Oswald looking out a window. Just over an hour after the president was killed, Dallas cop J.D. Tippit spied Oswald on a sidewalk in Oak Cliff, about three miles from Dealey Plaza. When Tippit went to confront him, Oswald shot the police officer dead and sneaked into a movie theater. But an alert witness saw him acting suspiciously, and called police. Just 70 minutes after killing the president, Oswald was in police custody.

Here you can see when Walter Cronkite announces the death of JFK; the first journalist who gave this terrible news. http://www.youtube.com/watch?v=2K8Q3cqGs7I

Over the years, theories have emerged involving the CIA, the Mafia, Cuba, Russia and even Johnson, Kennedy's successor. The trajectory of the three bullets fired that day has been dissected, countless books have been written putting forth various versions of events and several films have sought to get to the bottom of what happened on that day, a half-century ago.

A nearly year-long probe two years later by the Warren Commission concluded that both Oswald and Ruby acted alone. It did little to quell conspiracy speculation, and in 1978, the United States House Select Committee on Assassinations concluded that Kennedy was likely killed as part of a conspiracy, saying that there was “a high probability that two gunmen fired at [the] President.” As for who might have conspired with the self-styled communist who grew up in the Bronx, hating capitalism, the Congressional committee pointed no fingers.

In 2001, 81% of Americans believed that the whole truth was still unknown and argued for the conspiracy theory, according to an Associated Press survey. In 2003, it was 75%, according to Gallup. Today the percentage is over 60% and only 36% said to believe on the findings of the Warren Commission.