New York Times: President Obama arrived here on Thursday morning for the first foreign trip of his administration, a visit that was expected to focus on the fragile world economy, the sagging auto industry, international trade, Afghanistan and energy — in particular the question of how to turn Alberta`s oil sands into a clean source of power. Mr. Obama was greeted by the governor general of Canada, Michaëlle Jean, as well as the Canadian ambassador to the United States, Michael Wilson, and a …