It provided another personnel problem for the hosts, who were already without 10 players on international duty and another 13 on the casualty list.

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But the problem goes beyond personnel decisions.

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During January testimony before a House committee, Welsh likened sexual assault in the Air Force's ranks to a cancer and vowed to tackle the problem by screening personnel more carefully and putting an end to bad behaviors like binge drinking that can lead to misconduct.

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"The problem for G4S has been in allocating personnel through their scheduling programme to particular venue security tasks, " she explained.

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He praised the contractor as being "honorable" for having admitted the problem, apologizing and covering the costs of bringing in military personnel.

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The problem is that when a unit returns from a deployment, its personnel are often reassigned to other units and other assignments.

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The root of the problem, he says, is a 1980 law called the Defense Officer Personnel Management Act, or DOPMA, which lays out exactly how leaders in all the services should be promoted.

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