As shown in the titles, this film is about "the story of United States Air Force support to the Atomic Energy Commission on continental atomic tests". Narrated by Carey Wilson, it uses footage shown also in "Operation Buster-Jangle" of 1951 (avaiable here on Archive.org). Being a work of the USAF, this film is in public domain.

Usually shown in black and white, this is the original color version (slightly edited) of the 1955 atom bomb test in Nevada, showing the effects on test houses and utilities located at various distances from the blast.