In 1921 a mob of whites in Tulsa, Okla., descended upon a black-owned business district, burning it and murdering as many as 300 people. Contributor Kelefa Sanneh, of The New Yorker magazine, looks at a particularly heinous example from the ugly history of racism, and how it continued to color discussions of race in Tulsa for decades after. Subscribe to the "CBS Sunday Morning" Channel HERE: http://bit.ly/20gXwJT Get more of "CBS Sunday Morning" HERE: http://cbsn.ws/1PlMmAz Follow "CBS Sunday Morning" on Instagram HERE: http://bit.ly/23XunIh Like "CBS Sunday Morning" on Facebook HERE: https://www.facebook.com/CBSSundayMorning/ Follow "CBS Sunday Morning" on Twitter HERE: http://bit.ly/1RquoQb Get the latest news and best in original reporting from CBS News delivered to your inbox. Subscribe to newsletters HERE: http://cbsn.ws/1RqHw7T Get your news on the go! Download CBS News mobile apps HERE: http://cbsn.ws/1Xb1WC8 Get new episodes of shows you love across devices the next day, stream local news live, and watch full seasons of CBS fan favorites anytime, anywhere with CBS All Access. Try it free! http://bit.ly/1OQA29B --- "CBS Sunday Morning" features stories on the arts, music, nature, entertainment, sports, history, science, Americana and highlights unique human accomplishments and achievements. Check local listings for CBS Sunday Morning broadcast times.