Is China's economic muscle crushing the heart out of blue-collar America? Justin Rowlatt's been to Ohio to find out. But while America's industrial heartland's feeling the pinch, Mike Wendling finds that, in the social networking industry, Americans lead the field; Mary Harper tells us about the city in the Horn of Africa which has risen from the ruins of war; the story of an extraordinary Englishman who's immersed himself in Afghan tribal life is told by Nadene Ghouri; while Christian Parkinson makes a very important purchase in South Africa -- with a herd of cows!