But one day these two Wall Street giants will move on, leaving a huge gap.

ECONOMIST: Citigroup

Pascal saw a brief spark, and the top of his bottle broke apart, leaving a jagged gap in the glass.

NEWYORKER: Ghosts

First, it can diminish the value of an audit by leaving a significant gap in the information intended to help participants evaluate their plan.

FORBES: Pension Red Alert: 70% Of Pensions Are Never Audited

The problem is that investment by American firms has risen by even more than domestic saving, leaving a large gap to be filled by foreign capital.

ECONOMIST: Rainy-day blues

Some have threatened to resign, with the possibility of leaving Ecuador with a big gap in its legal system for many months.

ECONOMIST: Ecuador's new constitution

But the Republican Party's favorable rating has risen 10 percentage points since April, while the Democrats' favorable number has dropped, leaving a 4 percentage-point gap in the Democrats favor.

CNN: Poll gives Democrats reasons for hope, concern

Gap years, taken between leaving school and starting university, are also becoming a more common way of earning money to help fund students through university, the survey found.

BBC: News | Education | Pupils put off university, says survey

In today's briefing, the U.S. officials admitted there was a gap between what they say they know, and what they can show, leaving reporters with more questions than answers.

NPR: U.S. Says Iran Supplying Weapons to Iraq Militias