But then, President Nixon took the dollar off that fixed exchange rate system, and it's very hard to imagine how we could go back there now.

NPR: Global Summit Takes On Economic Turmoil

You all are tremendous heroes in your own rights, because we know how hard you all work to adjust to all the changes that go on in your life.

WHITEHOUSE: First Lady Previews the 2012 White House Holiday Decorations | The White House

We're going to go out there and play hard and just see how things go.

WSJ: James Madison poised for First Four without Goins

"Frankly, if they were to go forward with this launch, it's very hard to imagine how we would be able to move forward" with food aid, she said.

WSJ: U.S. Warns North Korea Over Rocket Launch