WASHINGTON (AP) — Air Force Secretary Deborah Lee James says the number of nuclear force officers implicated in a proficiency test cheating scandal has grown to 92 out of a force of 500.

James spoke to reporters Thursday after touring nuclear bases around the country, which The Associated Press has revealed suffers from such low morale and burnout that they have committed serious security lapses other breakdowns.

James, who is new to the job, said the nuclear force is beset by "undue stress and fear," and said the nuclear force suffers "systemic problems."

The Air Force announced recently that initially 17 officers were believed to have been involved in cheating on a monthly proficiency test to ensure they know how to maintain, and launch, nuclear missiles.

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