The man inside Big Bird and Oscar speaks

Caroll Spinney, 75, has played Big Bird and Oscar the Grouch on Sesame Street for the past 40 years. As Sesame Street turns 40, Spinney recalls: "When, I joined Jim [Henson], I asked, 'what is Big Bird like?' He said, 'That's up to you. I'm giving you free reign on developing the character.'"