Shot at a Blue Angels exhibition held at the Idaho Falls, ID airport in July of 2010.
If you ever want to know how much dust is on your image sensor, there is no better way to show it than shooting up into a clear blue sky. Lightroom spot brush saw a lot of use on these pics. Happily, you can paste the spot corrections from one image to the others.

Camera: Canon EOS 5D
Lens: Canon EF 28-135 3.5-5.6 IS
Processed in Adobe Lightroom 6 Develop module