Update: Watch Anderson's interview with author and Vanity Fair Contributing Editor Christopher Hitchens on his cancer diagnosis and whether it has changed his thoughts on God. Watch a new extended version of the interview.

Editor's Note: Read Christopher Hitchens's Vanity Fair article in which he opens up about having esophageal cancer.

Anderson Cooper

I just flew down to Washington to talk with author Christopher Hitchens. He was diagnosed with esophageal cancer in June, and is currently undergoing chemotherapy.

Many people upon receiving a cancer diagnosis would ask "why me?" Hitchens's answer, is "why not me?"

Much of his hair has fallen out, but he seems strong as ever. We discussed whether his diagnosis has in any way altered his well-known opinion of religion and prayer.

Tune in tonight for the full interview.

Read author Stephen Prothero's CNN blog about Christopher Hitchens.