I was just joking around about the idea of a Spacewall the other night. It was based off an idea that the CIA is withholding information about aliens from Trump because if he found out you knooooow he would tweet that sh*t. #SpaceWall!
Anyways, NASA isn't looking to build a space wall because they're not complete morons.
If you think you have the right stuff (wink, wink) to protect the Earth from alien life forms, check THIS out