In 1968, Martin Luther King Jr. was assassinated in Memphis, Tennessee. Decades after his death, his daughter spoke to Inside Edition about how her dad changed the world. By the time the '90s rolled around, racial tensions were at a boiling point, and as a result, the Los Angeles riots ensued. Home-grown terror struck in the Oklahoma City bombing and the Columbine shooting. The 21st century brought on more tragedies, including 9/11 and Hurricane Katrina.