03/22/2010 05:12 am ET | Updated May 25, 2011

Letterman Takes On 'Conniving' Jay Leno (VIDEO)

David Letterman has been clear about one thing in the mess over at NBC: don't blame Conan.

His Late Show has also been pretty clear about that "conniving Jay Leno," in this look back at the history of Letterman's longtime rival.