If this test is correct, the upper shot in the fuel tank had to be shot from lower than the 32nd floor to clear the lip of the tank.
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https://www.youtube.com/watch?v=TeSFugwUOkw

Las Vegas Fuel tank test 2nd. Shooter?

Published on Dec 28, 2017

This test was going show the Armor piercing Incendiary bullet impact on 6″x4″ 1/2″ thick angle iron just like the tank has welded around the top edge. BUT i couldn’t even take the shot because the angle from the hotel window will NOT make it past the lip sticking out. look at the close up photos in the following link paying attention to the higher shot of the two. It can not be made from room 32-134!!
VERY GOOD VIDEO ON API ROUNDS. https://youtu.be/EsNw4iCOJy4
I have to say after these tests (more are coming) that it must have been a .50 cal used to shoot the Vegas tank.