The report is the first broad assessment of management at Northeast, which has been besieged by an unusual cluster of problems in recent months.

This unusual cluster of stories - only the second in Maclin Bocock's 50-year career - is notable for the author's far-ranging ambitions.

But there was this other, highly unusual cluster of identically dressed men: college football coaches who had turned up to watch practice.

The woman, Polly Murray, was reporting an unusual cluster of a rare disease, juvenile rheumatoid arthritis, in her town.

Walnut twig beetles were associated with this unusual cluster of walnut mortality, but drought was originally thought to be the cause.

Many astronomers regard Omega Centauri as an unusual globular cluster because of its enormous size and mass.

Believing this unusual cluster held a secret to how the disease might be resisted, Ms. Learmont urged scientists to study these special patients.

The corps was ready to fly anywhere immediately to investigate reports of an epidemic or an unusual cluster of cases.

"I'm confident," he said, "that what Delta has seen is an unusual cluster of incidents that doesn't reflect on the performance of the airline."

Fascinated by the unusual cluster, he tried to pluck it so he might take it home and show his mama.