Fireworks lit up the Las Vegas Valley on the Fourth of July, and hundreds of people watched from the top of The Strat, billed as the tallest observation tower in the United States, as the country marked its 250th birthday. Skylar Dice, vice president and general manager of The Strat, said the resort hosted a big birthday party on its 108th level for the holiday. “You get to see the entire city's fireworks display as well as the Strat fireworks display,” Dice said.