Explorer file photo, Alexis Romero, 10, tests his mettle at last year's Fourth of July watermelon-eating contest at Ora Mae Harn Park.
Explorer file photo, A chihuahua shows its patriotism in Ora Mae Harn Park during Fourth of July festivities in 2006.
Explorer file photo, Dave and Feliciti Wilhelmsen staked out spots in the grass for prime firework viewing at Marana's Fourth of July celebration in 2006.
Explorer file photo, Katie Collins sits with her 2-year-old daughter Kaelan in her lap during a puppet show at last year's Fourth of July event in Oro Valley.
Explorer file photo,Children dance as conductor Albert-George Schram leads the Tucson Symphony Orchestra in an interactive musical celebration during Fourth of July festivities at Canyon Del Oro Riverfront Park in 2006.
Explorer file photo, Fourth of July festivities at the Hilton El Conquistador Golf and Tennis Resort last year included three rock concerts headlined by the pop group Lifehouse.