The Relationship Between Gravity and Electromagnetism

There seems to be a real relationship between gravity and electricity, electromagnetism. If you can make a device or a vehicle that also has a negative charge, it just repels gravity in a weird, electro-magnetic sense. It's a type of physics that they don't want us to know about, apparently. They are things that would be on the strange stuff bingo card, but they're just not ever really connected to living.