Upshot-Knothole Dixie

Upshot-Knothole Dixie was the fourth test-firing of Operation Upshot–Knothole, an atomic weapons test series conducted in 1953 by the United States at the Nevada Test Site.

Upshot-Knothole Dixie was an 11-kiloton airdrop shot which detonated at 6,000 feet altitude, the highest air burst detonation conducted to that date.