Operation Fishbowl was a series of American nuclear tests representing one of the last above-ground nuclear testing campaigns conducted by the United States. Initiated during the height of the Cold War, these tests were intended to examine the effects of nuclear detonations at high altitudes and improve missile systems. The major tests within Fishbowl included Starfish Prime, which on July 9, 1962, was detonated in the atmosphere above the Pacific Ocean. This remarkable explosion resulted in an electromagnetic pulse that affected electronic equipment as far away as Hawaii, demonstrating the far-reaching implications of high-altitude nuclear explosions. Following a series of successful tests, Operation Fishbowl was formally concluded on November 4, 1962. The timing of this conclusion was crucial as it coincided with the growing recognition of the need for nuclear arms control. The upcoming Partial Nuclear Test Ban Treaty aimed to limit future testing to underground sites, reflecting an international commitment to reducing the threats posed by nuclear weapons. The treaty was a significant step in diplomatic efforts to lessen Cold War tensions and encouraged other nations to consider similar limitations.