Invisible Soldier

By looking at that title 'Invisible Soldier' I think this is about the person with a technology because the word invisible indicates the technology and soldier indicates the person. 

How long have been the army has spent 5 billion dollars on camouflage?

8 years.

What is the material that U.S spent 5 billion dollars on?

Camouflage.

What is the camouflage?

A material pattern which can be used to camouflage soldiers in any terrain or environment.

What is Harry Potter is wearing in the movie?

The invisible cloak.

What technology is behind invisible cloak?

Quantum stealth technology

How does the invisible cloak work?

By bending the light around the person.

Who will benefit the most with this new technology?

Snipers.

Do you need a power source to make the cloak work?

No, you don't need a power source.