Senator Robert Kennedy is shot at the Ambassador Hotel in Los Angeles after winning the California presidential primary. Immediately after he announced to his cheering supporters that the country was ready to end its fractious divisions, Kennedy was shot several times by 22-year-old Palestinian Sirhan Sirhan. He was pronounced dead a day later, on June 6, 1968.

The summer of 1968 was a tempestuous time in American history. Both the Vietnam War and the anti-war movement were peaking. Martin Luther King, Jr. had been assassinated in the spring, igniting riots across the country. In the face of this unrest, President Lyndon B. Johnson decided not to seek a second term in the upcoming presidential election. Robert Kennedy, John’s younger brother and former U.S. Attorney General, stepped into this breach and experienced a groundswell of support.

READ MORE: Was 1968 America's Bloodiest Year in Politics?

Kennedy was perceived by many to be the only person in American politics capable of uniting the people. He was beloved by the minority community for his integrity and devotion to the civil rights cause. After winning California’s primary, Kennedy was in the position to receive the Democratic nomination and face off against Richard Nixon in the general election.

As star athletes Rafer Johnson and Roosevelt Grier accompanied Kennedy out a rear exit of the Ambassador Hotel, Sirhan Sirhan stepped forward with a rolled up campaign poster, hiding his .22 revolver. He was only a foot away when he fired several shots at Kennedy. Grier and Johnson wrestled Sirhan to the ground, but not before five bystanders were wounded. Grier was distraught afterward and blamed himself for allowing Kennedy to be shot.

Sirhan, who was born in Palestine, confessed to the crime at his trial and received a death sentence on March 3, 1969. However, since the California State Supreme Court invalidated all death penalty sentences in 1972, Sirhan has spent the rest of his life in prison. According to the New York Times, he has since said that he believed Kennedy was “instrumental” in the oppression of Palestinians. Hubert Humphrey ended up running for the Democrats in 1968, but lost to Nixon.