Death of Joan Rivers

Earlier this month, at the age of 81, Joan Rivers passed away.  I first became familiar with Rivers in the 1970s, during my high school years.  I was a fan of The Tonight Show with Johnny Carson, and Rivers was selected by Carson to fill in for him whenever he was gone from his television show.  Back then, there were only two female comedians who had any notoriety: Phyllis Diller and Joan Rivers.