Like every Fourth of July, wary locals will avoid the Mall’s impenetrable masses and blistering heat. But that doesn’t mean you should miss out on the big show. You can catch the rehearsal of A Capitol Fourth a day early, when temperatures will be lower and tourists less scarce. There won’t be any fireworks of course, but who needs them when you have David Archuleta’s sweet voice to woo you? In addition to Mr. Archuleta, the run-through will include the concert’s full lineup of Reba McEntire, Gladys Knight, Darius Rucker and the National Symphony Orchestra. The Saturday rehearsal is free and begins at 8:00pm on the West Lawn of the US Capitol. The real deal will be held same place, same time on the Fourth.