Actor Steve Martin and cartoonist Harry Bliss on new cartoon memoir

“CBS Mornings” co-host Gayle King sits down with actor Steve Martin and cartoonist Harry Bliss to discuss their new book, “Number One is Walking: My Life in the Movies and Other Diversions.” Martin shares behind-the-scenes stories about hit movies like, “Three Amigos,” and talks about getting Paul McCartney to sing one of his songs.