The Pentagon's new push to investigate reports of UFOs has so far not yielded any evidence to suggest that aliens have visited Earth or crash-landed here, senior military leaders said on Friday. However, the Pentagon's effort to investigate anomalous, unidentified objects -- whether they are in space, the skies or even underwater -- led to hundreds of new reports that are now being investigated, they say. But so far they have seen nothing that indicates intelligent alien life. We will go through it all," Kirkpatrick said, speaking at the first news conference since AARO was established in July. In 1994, the Air Force said it had completed a study to locate records relating to the 1947 "Roswell incident" in New Mexico.