To create an actual death star

I Zachary Authier, was thinking on a summer day that it would be significantly efficient and usable for the United States of America to build a Death Star as seen in the hit movie star wars. In this current day in age the United States of America can build an actual death star with the help of other countries. I think that this would be very effective for the U.S for defending against aliens and other life forms from invading earth