We don’t have much time until the United States runs up against the federal debt ceiling.
Here are a few related resources that might be useful (you might also be interested in The Best Resources To Help Understand The Federal Government Shutdown):
What’s up with the debt ceiling? is a CNN slideshow.
A recent history of America’s debt ceiling, in one interactive graphic is from The Washington Post.
History lesson: Why did Congress create a national debt limit? is from The Washington Post.
Foreign Holdings Of U.S. Debt is a Washington Post infographic.
Republicans and Obama in debt crisis talks is a Breaking News English lesson.