We are just at the start of the 21st century, so events from the mid to late 20th century are still relevant and culturally important. Why is 10 years suddenly

We are just at the start of the 21st century, so events from the mid to late 20th century are still relevant and culturally important. Why is 10 years suddenly the distant past? The specific genocide I was talking about was the Bosnian Genocide in the 90s http://en.wikipedia.org/wiki/Bosnian_Genocide http://en.wikipedia.org/wiki/Bosnian_Genocide