It is clear that certain members of the American military were keen to learn Nazi secrets, as shown by this portion of a 1945 letter from Major General Hugh J. Knerr to Lieutenant General Carl Spaatz, the commander of U.S. Strategic Air Forces in Europe:
“Occupation of German scientific and industrial establishments has revealed the fact that we have been alarmingly backward in many fields of research. If we do not take this opportunity to seize the apparatus and the brains that developed it and put the combination back to work promptly, we will remain several years behind while we attempt to cover a field already exploited.”
How are the above quotes a conspiracy..? It's a FACT that this was done. The three major powers (UK, USA, and USSR) had an Easter Egg hunt of sorts going in the closing year of war and the months after the collapse, for the Axis war programs and secrets. The US space program was BUILT upon German rocketry advances, and NACA (later NASA) was headed by a certain Werner Von Braun, Nazi rocketry wonder-boy. He took them to the moon, Baby!
Dec 7th, 1941 made the US an official super-power. Not the end of the war. The share of German technological advances captured by the US at the end of the war, merely cemented their relationship in the post-war world. It didn't make them a super-power in itself.
Quoting Admiral Yamamoto, a statement that he made before the attack, on the potential consequence of the attacks upon the US territory of Hawaii and it's military installations on Pearl Harbor and other interests, he recognized that the US was a nation of emmense resources and a resolute people, that made them a formidable foe. He recognized that the US, even in it's insular pre-war state, was a nation that could not be defeated just by attacks upon it's periphery.
Should hostilities once break out between Japan and the United States, it is not enough that we take Guam and the Philippines, nor even Hawaii and San Francisco. To make victory certain, we would have to march into Washington and dictate the terms of peace in the White House. I wonder if our politicians, among whom armchair arguments about war are being glibly bandied about in the name of state politics, have confidence as to the final outcome and are prepared to make the necessary sacrifices.
http://en.wikiquote.org/wiki/Isoroku_Yamamoto
The US became a super-power by virtue of it's own efforts, technological advancements, industrial might, and economic strength in order to defeat it's Axis foes - not the miscellaenious war booty that came out of it. The foundations for that ascendancy were laid in the beginnings of the industrial revolution in North America, at the beginning of the century.
It sounds like you are ignorant in reading for conspiracy lurking behind every tree, at the expense of your own education.