The base image is an old slide -- can't even remember when it was shot. I can "improve" it now. The fireworks are composited from individual shots of each burst.
Yes, great image. I'm impressed also with how you layered the fireworks over the monument (getting rid of the black sky in between the flash streaks). Nice general layers that say God Bless America!
Thanks, folks! I was conflicted about layering that burst over the Monument, but wanted to go for drama. (And show off my compositing skills.... ) In hindsight I would make the biggest burst even bigger and get rid of the spent burst above it (which was captured in the same shot) and put it behind the Monument.
The bursts are so easy to composite together, with perfect results when viewed at 100%. I neglected to say that I did some cross-processing on the Monument / Flag to try to give an effect of artifical light at night.