Many workers struggle with the persistent threat of homelessness and hunger.

The crime rate, although far lower than in the mid-90's, remains a persistent threat.

Domestic terrorism constitutes a persistent and serious threat, but not a strategic or existential one.

Until that becomes very difficult to carry out, then we'll see the popularity of advanced persistent threats continue to increase.

But that is a persistent threat whatever the Dow Jones does.

Without a fundamental balance like this, the future of humanity will be under persistent threat, and not only in Africa.

The argument from error will recur as a persistent threat.

Owing to persistent threat from encroachers, many of them would not like to go back to their villages.

As a reminder that fire was still a persistent threat, a huge basket hangs in the entryway.

While these unfortunate developments have increased uncertainty about near-term economic performance, it is the committee's view that they do not pose a more persistent threat.