The Kennedy Center Honors, bestowed over the weekend, gave taxpayer-certified propers to a characteristically wide and divergent cast of cultural presences: Buddy Guy, Natalia Makarova, David Letterman, Dustin Hoffman, and Led Zeppelin. The three surviving members of the latter entity appeared together, though they maintained their whole not-performing thing. Instead, a bunch of younger acts paid tribute: the Foo Fighters ...