PHILADELPHIA, Jan 17 - Barack Obama warned on Saturday that America faces ”a time of great challenge” as he launched pre-inauguration festivities with a special train trip to Washington, where in three days he will become president of the United States.
Mr Obama, a Democrat who will take office on Tuesday during the sharpest economic downturn in generations, has vowed to hit the ground running with plans to spend hundreds of billions of dollars to jolt the country out of a deepening recession.
