Greys and Time Travel

One of the reasons (this is my view) that President Eisenhower signed an agreement with the Greys to experiment with some humans if they returned them to their abduction point with no memories of what had happened would be for space travel. Though the U.S. could not publicly comment on this various people have seen our saucers parked in hangers like in Klamath Falls Airport. I saw one (likely the one parked at Klamath Falls Airport) in a hanger there in 1992 (I have never physically been to this hanger. I saw it above the house I was renting on an acre of land in Mt. Shasta city then) and likely also saw where it had landed on Mt. Shasta in 1974 in June as well. (It made a saucer shape in the snow about 5 to 6 feet deep and around 25 to 30 feet in diameter then).  There has been so much publicity about this saucer in Klamath Falls that I bet it has been moved since then to keep people from trying to get into the hanger to see it. (They don't like having to kill or incarcerate people for life if they see something they shouldn't). However, with Amnesiacs today that likely isn't necessary anymore. (Amnesiacs are drugs that make people forget things for specific periods of time). I have often thought these drugs might prevent PTSD if given to troops after they debrief from a horrific situation.

In 1992 it was accompanied by 3 Chinooks helicopters that can carry over 40 people each in formation painted Grey with no numbers, military insignia or anything else painted on them. Then I watched as they stopped with the accompanying Saucer in perfect formation with them. Then as they remained motionless for a minute or more I witnessed what I believe was time travel. Because the saucer simply vanished as I watched it. I really can't think of any other useful explanation for it than this. After the saucer disappeared soundlessly, I watched the three Chinook unmarked helicopters fly down Highway 89 towards Nevada.

One other possibility is that the military might have been testing holographic equipment by displaying a flying saucer over the little town of Mt. Shasta and then shut the holograph equipment off?

However, that doesn't make any sense to me at all why they would do this?

But, time travel when accompanied with Space travel makes a lot more sense. Because if you combine the two you could visit anywhere even before you left if you wanted to. So, using time and space travel together for example, a trip to Mars would be instantaneous and the return as well (to those inside the spacecraft.)

Also, if we are literally the Grey's Grandparents they would really have to be careful who they abducted or they might kill off some of their line in their time. So, what I'm thinking is they are mostly clones of maybe only about 100 to 1000 or 10,000 people in their genetic pool which is why they would have to interbreed with those in the present to survive.

Also, I'm thinking GPS satellites are partly for watching for entrances and exits from time by the U.S. government.