At a military base, not far from the city of Montauk, volunteers were irradiated with high-frequency radio pulses. It's hard to say what effect the scientists were going to achieve, but eventually people just started to go crazy. According to the official version, after this the project was closed. On the other, supported by some evidence, the American warriors really succeeded.
American engineer Preston Nichols is sure that the military carried out the so-called "slip" in the variational universe, that is, as such, there was no travel to the past, but the passage to the parallel history was opened.
According to other information, the radar (it still stands right in the city park of Montauk) was made for the implementation of the project to create psychological weapons. It looks more real than time travel. Of course, all data about the project remains classified.