our correspondent rene marsh has been working the sources. what are you learning? >> this would be an absolute major change tore people that travel by air also for how tsa uses its resources. the question is, why now? it is unclear, but what is clear is for nearly two decades tsa has trended towards more enhanced security measures. we do know with this proposal cost savings is certainly a component tsa is considering allowing thousands of passengers to board commercial airplanes across the united states without being screened. that's according to internal documents obtained by cnn the documents from june and july outline and elimination of security screening at small and medium size airports that operate commercial planes with 60 seats or fewer. tsa's recent cost analysis estimates the move could save $115 million that can be used to