"It is a commonly held belief amongst UFO researchers that other countries are waiting for the USA to take the lead on this investigation," says Ian Dubin, himself a UFO researcher based in Hong Kong. "Who knows what might come out?" [...] Congress is expected to receive on Friday the findings of a government-wide review into cases of documented but unexplained aerial phenomena and what might have caused them. Some details of the report have already been leaked, indicating that despite some compelling encounters Washington is not about to reveal the existence of "little green men." But those who have...