As you know, these are citizens who have been told they cannot leave Egypt.

WHITEHOUSE: Press Briefing

They cannot leave until white smoke emerges from the Vatican chimney -- the signal that a new leader has been picked.

CNN: Cardinals meet Monday, could set date to elect new pope

"They cannot leave the players isolated and afraid to speak out when they are confronted by the wrong individuals, " he told the Premier League team's website.

CNN: FIFA: Governments must help in match-fixing fight

Kent Reliance says they cannot leave and then join again.

BBC: NEWS | Programmes | Moneybox | Mutual boss tempts 'carpetbaggers'

Ms. AL-SUWAIJ: Well, women especially, you know, they will see--like, they cannot, for example, leave the house without the permission of the husband.

NPR: Iraqi Women Fight for Rights in New Constitution

But whereas Adam and Eve knew why they must leave, the settlers cannot understand their original sin.

ECONOMIST: Israel's settlers

Likewise, many people cannot leave unsatisfying jobs because they are dependent on that weekly or monthly paycheck.

FORBES: How Debt Limits A Country's Options

Many young people who would love to leave their hometowns cannot do so because they need a stable job before older Italians will rent them a flat, let alone give them a mortgage.

ECONOMIST: The government tries one more time, but it will be hard

We cannot leave innovation and education to local school districts because they're not big enough.

FORBES: 01.23.08, 6:00 PM ET

Our lives are forever tied to those lost, and we cannot leave them now, as we might have were they still living.

NPR: Sergeant Sorts Through War's Chaos in Letter Home

They can leave questions of law to the decision of a tribunal, but they cannot make it the final arbiter on a question of law.

BBC: Exchange of letters between Thanou and IOC