Everyone is still in shock about the death of Robin Williams. It's been a week since news about his suicide stunned his fans. There has been a lot of Twitter and Facebook traffic from celebs who knew him, but David Letterman knew him for 38 years, and last night, he remembered his friend.

The clip is long, but worth it. It's nice to see David Letterman remembering his good friend, but it's so sad to see someone try to make sense of such a sad event:

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