This image ranks as one of the more unusual shots of a nuclear explosion. It shows the high altitude atmospheric test codenamed Orange, which was part of a two-test pairing codenamed Operation Newsreel, which was in turn part of the broad series codenamed Operation Hardtack. These warhawks and their codenames, right? The test took place today in 1958 and was a 3.8 megaton blast lifted to an altitude of approximately twenty-seven miles above Johnston Atoll in the North Pacific Ocean by a Redstone Missile. The result was among the first well-studied nuclear electromagnetic pulses ever produced. You see a wider shot of the test below.