David Letterman’s moving tribute to Robin Williams [VIDEO]

Dave Letterman pays tribute to the great Robin Williams:

David Letterman used Monday’s The Late Show to pay tribute to Robin Williams.
Letterman showed clips from Williams’ appearances on his show, with the host saying he’d been friends with Williams for 38 years. Among the clips The Late Show trotted out โ€“ a young Letterman’s cameo on Mork & Mindy.
“What I will add here is beyond being a very talented man and a good friend and a gentlemen, I am sorry I, like everybody else, had no idea that the man was in pain and the man was suffering.”