Robin Williams (L) performs with comedian Rick Overton at a benefit event for the Throckmorton Theatre in Mill Valley, California in this April 14, 2012 handout photo released to Reuters August 14, ... more 
Robin Williams (L) performs with comedian Rick Overton at a benefit event for the Throckmorton Theatre in Mill Valley, California in this April 14, 2012 handout photo released to Reuters August 14, 2014. Williams was the only person who came backstage to see him when satirist Mort Sahl gave a show 17 years ago, and the 87-year-old comic said it marked the start of a close friendship that ended with the comedian's apparent suicide this week. Sahl, sometimes considered the godfather of stand-up political comedy, told about 80 people at an informal tribute to Williams on Thursday night that he had been expecting hordes of fans eager to tell him how much they had loved his show. REUTERS/Jonah Hopton/Throckmorton Theatre/Handout via Reuters (UNITED STATES - Tags: OBITUARY ENTERTAINMENT SOCIETY PROFILE) ATTENTION EDITORS - THIS PICTURE WAS PROVIDED BY A THIRD PARTY. REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THE AUTHENTICITY, CONTENT, LOCATION OR DATE OF THIS IMAGE. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. NO SALES. NO ARCHIVES. THIS PICTURE IS DISTRIBUTED EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS less 
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Reuters | Photo By HANDOUT / REUTERS
Fri, Aug 15, 2014 8:59 AM EDT