Aliens and the United States

Thousands of UFO sightings are reported in the United States every year, and intriguingly many of them center around U.S. military operations. Might extraterrestrials have a special interest in the country's warfare capabilities? Recently, the United States government has officially acknowledged that it is investigating unidentified aerial phenomena. What secrets have been kept from the public--and even some U.S. Presidents? And what role does the public play in demanding answers to our questions about extraterrestrials?