Includes two reports. In an effort to strengthen aviation security, a new passenger prescreening system known as Secure Flight (SF) is being developed by the TSA. (1) Measures for Testing the Impact of Using Commercial Data for the SF Program: review & analysis of TSA's draft statement of work for commercial data concept testing. Assesses the measures against performance measurement criteria developed based on best practices. (2) Secure Flight Development & Testing Under Way, but Risks Should Be Managed: Assesses the status of SF's development & implementation, factors that could influence its effectiveness, processes used to manage the SF program, & efforts to minimize the impacts on passengers & protect passenger rights. Illus.