David Letterman walks out on Joan Rivers interview

Joan Rivers continues her book tour. 

Three days after walking out on CNN after objecting to Fredricka Whitfield’s line of questioning, Joan stopped by David Letterman‘s CBS late-night show tonight. 

When she began to poke fun at June Allyson — America’s Sweetheart circa 1940 — Dave walked out and his guest was left to go it alone:

[The following video contains explicit language] 

More On This...