From 1945 until an atmospheric test moratorium in July, 1962, atomic bomb testing in Nevada was so common that Las Vegas tourists would hold parties just to watch the tests from their hotel rooms. Little was known, at least in the beginning, about the effects of nuclear fallout, or just how far it could actually spread.

On April 18, 1955, during what was known as Operation Teapot, the Columbus Dispatch reported that radiation from the testing site had reached Columbus.

The radiation had come from the MET test which occurred on April 15, 1955. The bomb was 22 kilotons in size. The video above is from the MET test itself.

Events like this happened several times as the jet stream carried radioactive fallout across the country, and the 1955 nuclear test fallout wouldn’t be the last. It’s unclear whether this fallout had any substantial health impacts long-term, locally or otherwise, but today we understand that even relatively low doses of radiation increase one’s risk for developing cancers down the road. Luckily, these increased levels tended to last a day or two only.