And here comes the scary bit : "The retention period for data specifically maintained in ATS will not exceed forty years at which time it will be deleted from ATS. Up to forty years of data retention may be required to cover the potentially active lifespan of individuals associated with terrorism or other criminal activities. The touchstone for data retention, however, is its relevance and utility."

But you have to look at it from a positive angle: If you want to claim miles to be credited to your frequent flyer program, in 2040 you could claim miles back from 2006 (if you have the right source inside the TSA)