Washington: An American nuclear physicist has labelled the denial of UFOs`` existence by the government as the "the biggest story of the millennium", insisting that the presence of alien spaceships has secretly been acknowledged since 1947.
"Some UFOs are intelligently controlled extraterrestrial spacecraft," Fox News quoted Stanton Friedman, as telling AOL News.
For 14 years Stanton has worked as a nuclear physicist for companies like General Electric, General Motors, Westinghouse and Aero jet General Nucleonics.
UFOs attracted his attention In 1958 and since then he has lectured about the subject at over 700 colleges and professional groups in all 50 states of the US and around the world.
Stanton said: "After 53 years of investigation, I’m convinced we’re dealing here with a cosmic Watergate."
"That means a few people within major governments have known since at least 1947 that some UFOs are alien spacecraft," he added.