The greys are our allies ...
Forgot the White House lawn; if intelligent life ever does visit Earth they'd do best to land in Saint Peter's Square. I can just see a little big-eyed Grey coming up to a priest:
meep-meep "Please take me to your leader."
"You mean His Holiness?"
meep-meep "That's what I said."
Seriously, the sheer size of the galaxy, let alone the universe, make s sense. All the same, let us pray they will be willing to listen. Anyone who saw the 1953 "War of the Worlds" film will know what I'm talking about. Let us also pray we are willing to listen as well, and not just start blasting away, ala "The Day the Earth Stood Still".
We'd do best to introduce any alien visitors to St. Francis, "brother wolf and brother grey".
The greys are our allies ...