1905: Kangra earthquake kills 20,000
A massive earthquake measuring 7.8 on the Richter scale decimated the Kangra valley in India’s Himachal Pradesh, killing 20,000 people.
American forces liberated the Ohrdruf concentration camp in Germany during the Holocaust, the first such move by the US Army.
Luther King Jr. shot dead
African-American civil rights activist Martin Luther King Jr. was shot dead outside a hotel in Memphis by James Earl Ray.
Bill Gates and Paul Allen founded Microsoft, which remains among the world's largest software firms.
Jack Ma founded the Chinese internet company Alibaba.