If I could invent any one thing, it would be something that could protect people from the atomic bomb. One day, this whole world may be destroyed because two nations didn't get along. If I could invent something that could just swallow up an atom bomb and make it disappear without any harm to anything on the earth, the whole world would be a better place.
I would invent this because, everybody in the world lives in fear. Fear of being blown up every time some kind of conflict rises between two nations. Whether it be terrorists attacking other countries, or power struggles among big or small nations. With just a push of a button a whole country could be wiped out, and would cause millions if not billions of needless deaths.
This invention of mine would detect any kind of bomb coming and swallow it up. Thus saving many lives and making it so there is less tension in the world. The United States in particular wouldn't have to worry about infuriating these small terrorist groups that would do anything to destroy our freedoms.
This invention would also be good, because it would pretty much be the perfect home land defense system. Which would then save a lot of money that we would spend on SAM sites and other types of defense. This would be all we needed in terms of aerial attack. We"re pretty much set in everything else, so this would help us out a lot. The money saved could be put towards something better, like schools or something. All in all, this would be one of the best inventions for the United States, the world, and everyone, and everything in it.