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April 20, 1999: 18 year old Eric Harris and 17 year old Dylan Klebold kill 13 people in a shooting rampage inside Columbine High School in Littleton, Colorado. Until 2007, it was the deadliest school shooting in US history, when surpassed by the VT massacre.

History of the terms "Cracker" & "Redneck" Redneck is wrong --it comes from the red bandanas Confederates wore around their necks

Dorothy Counts, the first African American girl to attend an all-white school, being taunted by her peers. This girl's strength ...

D-Day by the Numbers - A fascinating and sobering look at the realities of the D-Day invasion 70 years ago.

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The Oklahoma City Bombing: A Look Back - Photo Essays

April 19, 1995: Timothy McVeigh sets off a massive fertilizer bomb in front of the Alfred P. Murrah Federal Building in Oklahoma City, OK. 168 people were killed, including 19 children who were at the day-care inside the building at the time, making it the largest act of domestic terrorism in US history.

A B-25 bomber crashes into the Empire State Building on the morning of July 28, 1945. New York Times photographer Ernie Sisto had two of his friends hold his belt while he dangled off the side of the building to snap this photo.

This photo, one of the most widely distributed after the war, shows a German soldier shooting a Ukrainian Jew during a mass execution in Vinnytsia, Ukraine, sometime between 1941 and 1943. This image is titled "The last Jew in Vinnitsa", the text that was written on the back of the photograph, which was found in a photo album belonging to a German soldier. The German is no more than 20 years old. The youth in the black uniform in the background is no more than 16.

Washington Monument as it stood for 25 years, 1860. George did NOT want any monument erected for him; he chose to be buried on his home estate. He considered monuments to be objects of conceit and arrogance. In 1833, the 100th anniversary of Washington's birth, a group of concerned citizens formed the Washington National Monument Society. This started a process in 1888. (A 25-year gap in this picture and the "color band" we see to this day.) Photograph by Mathew Brady.

The US Capitol, Washington, DC as it appeared in 1861. Today (12 April) is the day in 1861 when Confederate artillery opened fire on Fort Sumter in Charleston Harbor, ushing 4 years of civil war in America. By 1865, approx. 625,000 Amercians had perished as a result of the war. This was the deadliest war in American history.

Adolf Hitler, age 35, on his release from Landesberg Prison, on December 20, 1924. Hitler had been convicted of treason for his role in an attempted coup in 1923 called the Beer Hall Putsch. This photograph was taken shortly after he finished dictating "Mein Kampf" to deputy Rudolf Hess. Eight years later, Hitler would be sworn in as Chancellor of Germany, in 1933.

On April 27, 1977, two 747's collide on the single runway at the Tenerife airport. Delayed by fog, the Pam Am pilot decides he has waited long enough and starts down the runway. Only when it is too late does he realize there is a KLM 747 also taxiing for take-off. He tries to fly over the KLM plane but rips into it causing a massive explosion. The Pan Am struggles to take off, but explodes at the end of the runway. 583 killed, 61 survivors in the worst accident in aviation history.

Kent State, May 4, 1970. Four dead, 9 injured for protesting the invasion of Cambodia. John Filo's iconic Pulitzer Prize-winning photograph of Mary Ann Vecchio, kneeling in anguish over the body of Jeffrey Miller minutes after he was shot by the Ohio National Guard.

Elizabeth Blackwell was rejected by 19+ medical schools but was finally accepted by Geneva Medical College in NY. She graduated on January 23, 1849 to become the first female doctor in history.

"Don't be afraid." That's what Ruby Bridges's mother told her on November 4, 1960. Little Ruby listened carefully to the advice. Soon, four United States federal court marshals, or officers, arrived at the Bridges family home in New Orleans, La., to drive the first grader to William Frantz Public School. A screaming mob was waiting. People stood near the building shouting. Ruby held her head high. With the marshals surrounding her, the 6-year-old walked into the school and into history

Seventeen year old Lepa Radic was publicly hanged from the branch of a tree, in Bosanska Krupa in Bosnia in January 1943, for shooting at German soldiers.

The Chernobyl disaster was a catastrophic nuclear accident that occurred on 26 April 1986 at the Chernobyl Nuclear Power Plant in Ukraine (Ukrainian SSR), which was under the jurisdiction of Moscow. An explosion and fire released large quantities of radioactive contamination into the atmosphere, which spread over Western USSR and Europe. It is considered the worst nuclear power accident in history, and is one of only two classified as a level 7 event on the International Nuclear Event Scale.