On April 4, 2013, one of America’s best-known and most influential movie critics, Roger Ebert, who reviewed movies for the Chicago Sun-Times for 46 years and on TV for 31 years, dies at age 70 after battling cancer.

On April 4, 2007, syndicated talk radio host Don Imus ignites a firestorm after making racially disparaging remarks about the Rutgers University women’s basketball team, insulting their appearance and tattoos and, most infamously, calling them “nappy-headed hos.

On April 4, 1983, the space shuttle Challenger successfully launched into orbit from Kennedy Space Center, marking a historic milestone in NASA's shuttle program.

The American airlift of Vietnamese children deemed war orphans to the U.

On April 4, 1975, at a time when most Americans used typewriters, childhood friends Bill Gates and Paul Allen found Microsoft, a company that makes computer software.

On April 8, 1974, Hank Aaron etched his name further into the annals of baseball history, tying Babe Ruth’s legendary home run record by smashing his 714th career homer at Riverfront Stadium in Cincinnati.

On April 4, Opening Day of the 1974 Major League Baseball season, 39-year-old Hank Aaron sends the very first pitch he sees over the wall, tying the all-time home run record set by Babe Ruth.

The “Twin Towers” of the World Trade Center officially open in New York City.

On April 4, 1973, the twin towers of New York's World Trade Center were officially dedicated in a grand ceremony that marked a significant milestone in the city's architectural and economic landscape.

Clocking in at three hours and 32 minutes, William Wyler’s Technicolor epic Ben-Hur is the behemoth entry at the 32nd annual Academy Awards ceremony, held on this day in 1960, at the RKO Pantages Theatre in Hollywood.