I am a big sci-fi fan but i have never ever bought the aliens story...
How come they always land in the US ?
Why not Kenya ?
[Is it because we dont have Newyork Stock Exchange or Nasdaq ?]
There was a rumor of a sighting in the Maasai Mara back in 1986 ,, or is it 1987 ?
But these are just rumors - mabbe it was an anti-gravity test vehicle ?
The day I see one or an undeveloped photo still in camera, then we can say we have an unidentified craft [but not aliens 

]