With Barack Obama taking oath yesterday as America's 44th and first African-American president, the United States turned a page and closed a chapter. Obama's spectacular success story is packed with poignant, and powerful, symbolism. If he accepted the Democratic nomination last August on the anniversary of Martin Luther King Jr's `I Have A Dream' speech, his inauguration follows the American holiday in memory of King. It is the culmination of an extraordinary story and a new beginning. Obama rode on a ticket for change. A country left bitter, fearful and divided by eight years of George W Bush's presidency, welcomed him with relief and expectation. The world, which had viewed America with growing alarm during these years, tuned in to Obama as well. He represented hope that America would manage its own house responsibly and favour consensus and cooperation while dealing with the world. But as enormous as his moment in history are the challenges Obama will face from ...