Horror at a suburban Denver high school. On this date in 1999, two heavily armed Columbine High School students -- later identified by authorities in Littleton, Colo., as Eric Harris, 18, and Dylan Klebold, 17 -- entered the building and opened fire on their fellow students. They killed 12 teenagers and a teacher before turning their guns on themselves. It was by far the worst in a series of school shootings.
In 2002, Pope John Paul spoke out on the sex scandal that had shaken the Roman Catholic clergy. He said bishops must "diligently investigate accusations" against priests who broke their vows of celibacy.
It was on this date in 735 B.C., according to the Roman historian Varro, that Romulus founded the city of Rome.
The U.S. Supreme Court on this date in 1976 ruled that federal courts could order low-cost housing for minorities in a city's white suburbs to ease racial segregation.
Congress took a swipe at the KKK in 1871, passing the Third Force Act, popularly known as the Ku Klux Act. The new law authorized President Ulysses S. Grant to declare martial law, impose heavy penalties against terrorist organizations and use military force to suppress the Klan.
Elton John, Guns N' Roses, Roger Daltrey, Liza Minnelli, David Bowie, George Michael, Def Leppard, and Spinal Tap joined the surviving members of Queen at an AIDS Concert for Life on this date in 1992. The show honored Queen's lead singer Freddie Mercury, who'd died of AIDS the previous November. More than 70,000 people attended the concert at London's Wembley Stadium.
We now return you to the present, already in progress.
Celebrity Couples of 2014 [PHOTOS]