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Pursuant to a congressional request, GAO provided responses to questions following its August 6, 1998, testimony on the Federal Aviation Administration's (FAA) management of technology issues, focusing on: (1) why risk assessments are essential in the design of the new air traffic control (ATC) systems; (2) what role should the National Airspace System (NAS) Infrastructure Management System play in protecting critical airspace infrastructure; (3) whether FAA will be able to adapt its systems to protect it from evolving threats; (4) what FAA has done to comply with the planning requirements of the Presidential Decision Directive 63; (5) the reasons why 15 mission-critical ATC systems were dropped from the list of systems needing repair prior to the July 31 milestone; (6) when FAA plans to run end-to-end tests of all key business processes; (7) whether FAA included key user groups in its formulation of year 2000 contingency plans; (8) whether FAA's contingency plans include the possibility of complete systemwide breakdown; (9) whether FAA can successfully complete its ATC modernization, given its poor track record for completing large computer and software-intensive projects; and (10) what is the chance that FAA will not complete all of its year 2000 renovation and testing activities before time runs out. These responses cover two areas--FAA's computer security and year 2000 program.

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