Unix Timestamp: 640137600
Sunday, April 15. 1990, 12:00:00 AM UTC

President of ZaireMobutu Sese Seko lifts a 20-year ban on opposition parties.

Cold War: West Germany and East Germany agree to merge currency and economies on July 1.

Earth Day 20 is celebrated by millions worldwide.

Lebanon hostage crisis: Lebanese kidnappers release American educator Robert Polhill, who had been held hostage since January 1987.

Food poisoning kills 450 guests at an engagement party in Uttar Pradesh.

"STS-31": The Hubble Space Telescope is launched aboard Space Shuttle "Discovery".//www.nasa.gov/mission_pages/shuttle/shuttlemissions/archives/sts-31.html