US Livermore National Laboratory via its YouTube Channel A rare nuclear weapon test video was decrypted. The first batch of highly classified nuclear test videos was released in March this year, and it announced a total of 126 62 video in the US time in Thursday. The United States carried out 210 atmospheric tests between 1945 and 1962, each with multiple video recorders, but the recorded footage has been kept in a high-security vault for decades, and the materials themselves are being degraded and permanently lost if they are not digitized in time. Livermore researchers and archiving experts collaborated in the scanning, analysis and decryption of these nuclear weapon test videos. The United States and the Soviet Union signed an agreement in 1962 to stop testing the atmosphere for nuclear weapons, and the nuclear test turned underground.