Date: Mar 14, 2013 2:53 AM
Author: Jonathan J. Crabtree
Subject: Funny Pi Day video. At 3.14 mark, David Letterman realises what pi  means!

Is David Letterman an idiot or a comic genius?

David Letterman talks to Daniel Tammet about pi and how Daniel memorised it to 20,000 places.

Happy Pi Day!

Jonathan Crabtree