The gift shop was overpriced, so Handy and Karen bought a single postcard and mailed it to themselves as a souvenir.

NEWYORKER: The Grand Tour

Treasury Secretary Tim Geithner's tax troubles--a result, his handlers had said, of tax code complexity--underscore the need to drastically simplify that code with a flat tax, where a return can be filed on a single sheet of paper or even a postcard.

FORBES: Fact and Comment

Treasury Secretary Tim Geithner's tax troubles--a result, his handlers had said, of tax code complexity--underscore the need to drastically simplify that code with a flat tax, where you could file your return on a single sheet of paper or even a postcard.

FORBES: Flat Tax, Anyone?