What country want to attack U.S.? Nobody, none. Even its great enemy the USSR was fabricated. USSR was U.S. indispensable ally in WW2, without which U.S. would surely lose the War in both Europe and Pacific. The Cold War was fabricated to justify the build up of a military empire, the one president/general Eisenhower warned against so famously. Ike failed. USSR offered twice to end the Cold War - rejected. JFK was killed in large part because he wanted to end it. For defense, the U.S. military budget needs only about $100B, make that twice for the most robust most lethal defense including nuclear. It's budget is $650 billion plus $200 billion on actual fighting wars plus $200 billion for veteran and associated things. $1 trillion every year. About $500 billion of military spending is to build and maintain its vast military empire to control the world, maintain the dominance of the dollar, control sea lanes, extract foreign wealth, and just plain old bullying fun. Its British Empire II.