I've seen objects in the sky I couldn't identify, mainly metallic spheres on a number of occasions. One of my sisters saw two of them with me, at first she tried to rationalize it but when she couldn't come up with a reasonable explanation she chose to LIE (for fear of the stigma attached to such things) and deny seeing anything.

 And they also made dogs as suicide bombers to attack tanks....Their was a problem though the dogs attacked all tanks also the friendly ones;.Or it were the russians who made the dogs act like that?

Hmm..

obviously some alien walked up to some dude and was like "greetings" and the dude got freaked out and ran thats why they dont just show themselfs.

Or maybe a part of thier history has already revealed that if you go to an
"un-advanced planet" like ours, and present yourself without warning or
"time to understand" it will cause catastrophic panic of unimaginable proportions. as you know history is here so we dont repeat it.