Terry Gross

For more than 20 years, puppeteer Kevin Clash has been the voice behind the lovable red monster on Sesame Street. Both Clash "and" Elmo talk with Terry Gross about performing with Jim Henson, and creating a fun, educational experience for preschool-aged children.

The comedian's latest special, Live at the Beacon Theater, was released earlier this week. C.K. talks about why he went with Web distribution this time, and reflects on his award-winning TV series, his relationship with other comedians and his USO appearances.

In his book Extra Virginity, Tom Mueller explains why you can't believe everything you read on olive oil labels. Much of the "extra-virgin" olive oil sold in the U.S. has actually been mixed with lower-priced, lower-grade oils and artificial coloring, he says.