On this day: May 20

Published On: May 17 2013 04:26:12 PM CDT   Updated On: May 20 2013 01:00:00 AM CDT
Vasco da Gama arriving in India, 1498

Vasco da Gama arrives in India, Christopher Columbus dies, Norman Rockwell makes his Saturday Evening Post cover debut, HIV is discovered, and "Cheers" airs its series finale, all on this day.