It's one of the greatest Rock Flights in Rocker history. Foo Fighters 20th birthday in Washington D.C. on the 4th of July.  But you only have until Friday at 6 p.m. to get entered at wrkr.com.

But this isn't just a reminder.  In case you missed it last night, here's the band on Letterman's final show.  Good luck and enjoy.

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