That would certainly jive with the many USO sightings, and some of the recent leaked video from military sources. My theory stems from the Rendlesham Forest incident, in which active-duty Air Force serviceman Jim Penniston claims to have touched the craft that was spotted by dozens of people on base and instantly received a "download" of information, which included the message that the craft's inhabitants were humans from the future. My theory is that these future humans return to our timeline periodically to try to prevent us from destroying ourselves, which is why craft have often been sighted near/above nuclear missile sites.

And yes, I know this all sounds insane. But the Navy videos of craft doing things that no one can explain are real...so I'm just trying to come up with some comprehensive explanation.