TSA officials have not yet determined whether commercial data will be used to screen passengers.
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Emergency employees remain on the job under winter storm warning.
Agency says any new system will have challenges, but problems with paychecks are rare.
Rail operator CSX and Transportation Department trying to have ban lifted.
Rumsfeld questioned about whether Defense is implementing provision prohibiting it from favoring contractors that reduce costs by offering less comprehensive health coverage than federal employees get.
Probe aims to determine if procurement executives violated federal conflict-of-interest laws.
A former government technology guru goes to the private sector, helping contractors design their pitches.
Proposals to loosen immigration requirements could slow action on the legislation.
In wake of scandal at Defense Department, new working group aims to combat abuses in acquisition system.