A review of endogenous growth models is given. The USA can keep up as the global leader thanks to the vast domestic market, the effective corporate sector, capabilities for financing large-scale projects, and, most importantly, the excellent science & technology performance along with perfect education system and innovation capacities. The S&T performance in the USA is shown by use of abundant statistical data (including retrospective ones) on R&D expenditures compared with selected countries of the world, R&D financing by source, R&D expenditures by performing sector, R&D funds of leading universities, R&D funds of universities and colleges by research fields, R&D expenditures and domestic sales of high tech industries. The companies' role in R&D financing is emphasized, with reference to the Bayh-Dole Act as a powerful engine for R&D and technology transfer. The American economy's position in the world market as the largest supplier of commercial knowledge-intensive services, high tech products and information & communication services is shown. Also, concerns of the American scientific community are mentioned: the shrinking share of the USA in the global high tech exports, imbalance between the American investment in high tech and knowledge intensive activities of other countries and the foreign direct investment in these activities in the USA; negative balance of foreign trade in high tech commodities; the degrading quality of education when the demand for qualified workforce is met by immigrants.