And the President is committed to doubling exports over the course of the next five years.

WHITEHOUSE: Press Briefing by Deputy Press Secretary Bill Burton

Most of our fee-charging graduates have increased their fees during our signature six-week course, some doubling or tripling them.

FORBES: Your Reputation is No Joke - It's Your Super Power

Putting only 10% of America's jobless men through a two-year community-college course, say, would mean doubling expenditure on training.

ECONOMIST: America's jobless men: Decline of the working man | The