The Late Show host David Letterman retired after 33 years hosting one of the most popular evening television shows and Olympians bid farewell to him on social media. 

#tbt special memories. Thanks David we wish u the best 💗 @mckaylamaroney @gabrielledoug @jordyn_wieber @kyla_ross96 pic.twitter.com/sXDpdqokw4

— Alexandra Raisman (@Aly_Raisman) May 21, 2015

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