There are no flying saucers come from outer-space visiting military basis.
If these Aliens were so advances they could travel hundreds of thousands of light years across the universe why would they care about American Military basis with outdated technology?
Second, it’s IMPOSSIBLE by the very laws of nature for anyone to travel the speed of light. Your mass will become INFINITE at the speed of light. Third, if you could, even an object the size of a raisin hitting your space craft at the speed of light would be equivalent to 80 atomic bombs going off.
Fourth, even if you could travel the speed of light and have nothing strike your craft, it would still take you 100,000 LIGHT YEARS to just travel across our own galaxy, let alone from another one. And last, even the nearest star to earth is 4 Light years away.
Even traveling at the fastest speed know possible it would take hundreds of thousands of years to reach earth.

The idea of ALIENS are nothing more than the god of atheists.