Despite a quadrupling of forest visitors since 1990, fewer than 50 people require rescue per year.

Two of these races have a similar problem; some of their members are being held captive and require rescue.

Lacking any one of these puts one in serious peril of requiring expensive and hazardous rescue, even death.

Occasionally, cavers abseil into this and are unable to retreat, requiring rescue.

Robots appearing in later waves roam the street and hurl citizens to lethal heights requiring rescue.

The princess does not at this time require rescue.

"Yes, well, there is some question as to whether or not I require rescue," she told him.

Acting out of compassion and sympathy will often require rescue where someone is in need.

Of the nearly 8,000 people who hike it each summer, about 50 require rescue.

The aircraft returned to the two ships and signalled that there were shipwreck survivors in the water requiring rescue.