The final set of images:

Downtown Chattanooga, with the Tennessee River in the foreground.
As you can see, lighting conditions weren't ideal for photography
that day.

Fireworks are available year-round in Tennessee, and there was
definitely an abundance of fireworks vendors in the state. This is
Big Daddy's Fireworks in Pittsburg, one of the bigger ones in
Tennessee.

Crossing the Tennessee River on the way back to Alabama.

The Russell Cave
National Monument near Bridgeport, Alabama. A pretty poor
excuse for a National Monument, if you ask me...

Looking out the mouth of Russell Cave.

At the Nashville International Airport. That's the
Northworst Airlines DC9-50 that will be flying me
back to the Twin Cities. Unlike the flight down, this time, they
actually managed to locate a flight crew to fly the plane, but we
still left 45 minutes late, with no explanation whatsoever for the
delay. 
That's the lot!