Has the U.S. government secretly retrieved exotic craft of “non-human” origin? Newly declassified documents, along with extraordinary legislation, illustrate how two successive Democratic Senate majority leaders appear to have believed so. Notably, Sen. Chuck Schumer (D-N.Y.) and the late Sen. Harry Reid (D-Nev.) were not alone in their focus on UFOs. The Democratic heavyweights received critical support and encouragement from a bipartisan group of high-profile senators over the years, including former fighter pilot and famed astronaut John Glenn (D-Ohio); Ted Stevens (R-Alaska), who observed a UFO as a World War II pilot; Daniel Inouye (D-Hawaii), then-chairman of the Senate Appropriations...