UNITED NATIONS (AP) - International migrants send about $240 billion to their home countries yearly, a significant engine of growth for the world economy, the Global Commission on International Migration said Wednesday. But the 19-member independent panel said in a report that world governments have failed to take advantage of the enormous opportunities that result from such migration or to manage the challenges posed by the foreigners' arrival. The clearest finding from the commission's nearly two-year study is "the great importance in (economic) growth terms, and development terms, that is created out of migration," said Jan Karlsson, Sweden's former minister...