Many American officials privately describe the Uighurs' plight as one of the more troubling episodes of the Bush administration's detention program.

A continuing self-examination of a troubling episode in this city's past has led to more murder charges stemming from a race riot more than three decades ago.

Week after week, Ms. Hoffman said, she witnessed troubling episodes.

"In the long run," he said, "the patients did best who received no medication or used it only during the most troubling episodes."

It was the latest in a series of troubling episodes in the city's schools.

Today, the company prefers to call that troubling episode a "catalyst for change."

But in his record as governor there was one similarly troubling episode.

For Boeing, the 757 orders are a welcome change from some troubling recent episodes.

The committee said it could not reach similar determinations about two other troubling episodes.

One troubling episode, now the subject of a criminal inquiry, involved a 1995 tutorial on rocket launches given by Hughes engineers to Chinese scientists.