We were in DC on the 4th about 10 years ago and by noon the mall was PACKED! Tourmobile quit running because it couldn't navigate the streets around the mall with all the people. Someone had made the suggestion to us to watch the fireworks from the area of the Marine Corps War Memorial and the Netherlands Carillon, and that turned out to be a lovely, much-less-crowded spot with a perfect view of the fireworks. The fireworks were done to music which was broadcast on local radio stations. Some people had their boom-box type radios on so we could hear the music too.