Stephen Colbert swears there won't be any late-show wars with Jimmy Fallon

There was no love lost between David Letterman and Jay Leno, but their two late-night shows managed to co-exist fairly peacefully thanks to the 3,000 miles between them.Now, in the new late-night landscape? It's very close quarters. Ever since Jimmy Fallon's "Tonight Show" moved to New York City, the show is just a few blocks from its rival, "The Late Show." Will that be a problem for Stephen Colbert, who begins his official "Late Show" reign in September?