A former government official named David Grusch, who has worked in the National Geospatial-Intelligence Agency and the National Reconnaissance Office, has gone public and is saying some curious things.

Grusch says that he’s been told of secret government programs that have “intact and partially intact vehicles” of non-human origin. He says he’s been told both the US government and other governments have been engaged in a “publicly unknown Cold War” to try to reverse-engineer technology from these craft.