Brian Williams appeared on David Letterman's show Monday, and the late night host had just one request of his guest: stop going on Jay Leno's show.
Williams is a regular on both shows, which means he sometimes has to deal with the awkward fact that Leno, his fellow NBC host, is a bitter rival of Letterman's. On Monday's show, Letterman seemed determined not to let him forget it.
Source:huffingtonpost.com
