By Holly Yan
By now, you probably know Christopher Columbus didn't discover America. He wasn't even the first European to do it.
Somehow, the 15th-century Italian explorer still got his own national holiday. But more cities and states are scrapping Columbus Day to honor the people who were here first -- and who suffered greatly after Columbus' arrival.
Just this year, at least a dozen US cities -- including San Francisco and Cincinnati -- decided to stop observing Columbus Day and will instead celebrate Indigenous Peoples Day on Monday.