What would you do if a UFO landed at the white house?

wonder how other countrys would react to aliens landing in USA and not their country, would they get nervous and launch a pre emtive strike at aliens or just sit and see what happens?

What would I do if an extraterrestrial craft landed at the White House? I would be ecstatic.

I think one tried to land there earlier in December 2003 when the White House got evacuated. So IMO, if a flying saucer did try to land at the White House, we most likely would never hear about it.