The issue focused on in the recent visit to the White House of US President Barack Obama. It's a problem that's been around for more than a century, and it's one that's now making a comeback.The United States is in the grip of a food crisis. In the US, it's the number one issue in the local media, and is the top story in the country on the front page of the New York Times. In the US, it's the number one issue in the local media,