The new threat may or may not involve more United States aircraft.

The threat to your Duke involves defection of a trusted companion or lieutenant.

There was no indication whether the threat involved commuter or long distance trains, or both.

Only late in the 20th century was escape allowed if the threat involved illegitimate economic harm.

Said the Secret Service hadn't specified whether the threat involved the boy or girl.

Often the threats involve saying someone will be fired or demoted.

For the most part, these threats involved danger and were aimed at the dreamer themselves.

But he also said, "No specific threat involving really a domestic operation or involving what happened, obviously - the cities, airliner and so forth."

However if the threat involves the mention of a bomb it is automatically a crime.

Another major threat involves the fouling of native freshwater mussels.