UFOs survey: 84 percent says US government knows more than it's telling

More than 8 in 10 respondents to a recent CBS News/YouGov poll said that the federal government knows more than it is disclosing to the public regarding UFOs, after the Pentagon released a trove of files on the subject.

The survey, conducted from June 2 to 4, found that 84 percent of 2,023 respondents said that the...