Interactive learning, liberal education, independent thinking and democratic principles are the fundamentals of US learning environment. International students on successful completion of their US study are in great demand from employers round the globe.The USA is the world's foremost economic and military power, with global interests and an unmatched global reach.America's gross domestic product is equivalent to a quarter of the world total. Its military budget is expected to be almost as much as the rest of the world's defense spending put together.