Here’s Echodrone’s “Under an Impressive Sky,” with a video assembled from lots of tasty atomic testing footage (which, if I’m not mistaken, is from the 29 kiloton Apple-2 atomic test performed under Operation Teapot on May 5, 1955 (5/5/55).)
For more Echodrone, see here.
For more information on atomic testing, see Samuel Glasstone’s The Effects of Nuclear Weapons.