Summary

This letter responds to Congress's April 24, 2007, request that GAO address questions submitted for the record by Members of the Subcommittee related to the March 29, 2007, hearing entitled JPDO and the Next Generation Air Transportation System: Status and Issues.

As agreed, in addition to the responses that we provided on May 18, 2007, to two of the questions Congress submitted regarding the role of the Joint Planning and Development Office (JPDO), we are answering the remaining questions submitted by the House Committee on Science and Technology, Space and Aeronautics Subcommittee. Our attached responses to these questions are based on our previous and ongoing work and our knowledge of the areas addressed by the questions. We prepared our responses during May 2007 in accordance with generally accepted government auditing standards.