Well think of gravity as a vector pointing radially towards the center of the earth, so that means that when you are at the center of the earth those vectors would cancel out on a infinitely small point (ie: center of the earth) so I would assume that there would be zero gravity.

Before landing an airplane, they will release an amount of fuel in like an aerosol so the fuel evaporates faster in the air. They do so so that they are lighter and also there is less fuel to burn in case of an accident. They usually just keep enough so they can have another attempt - if needed- to make a landing in…

Thats funny you post that video... I watched it in my Manufacturing class on Tuesday...

I see what you did there... lol nice1