Der Spiegel ---- The United States remains mired in an economic crisis. The country that has managed to reinvent itself so many times is struggling. Three years after the collapse of the investment bank Lehman Brothers, unemployment remains high; the official rate is 9 percent, but the unofficial one is 16 percent. Growth is crawling along at less than 2 percent, and the country's debt burden is swelling by $4.38 billion a day. Many cities are so broke that roads and bridges are in disrepair, and some areas of America already resemble a Third World country.