The Pentagon's newest batch of UFO files has confirmed what previous releases only hinted at: unexplained objects have been showing up over America's nuclear weapons sites since at least 1949, and not a single case has ever been formally closed.
The fourth tranche of the government's UFO disclosure effort, released on 10 July under the PURSUE programme, is the smallest of the four batches at 40 files. But it is also the most direct evidence yet that officials have never been able to explain what keeps appearing near the country's most sensitive military installations.
