Book excerpt: "TRB's Airport Cooperative Research Program (ACRP) Report 93: Operational and Business Continuity Planning for Prolonged Airport Disruptions provides a guidebook and software tool for airport operators to assist, plan, and prepare for disruptive and catastrophic events that have the potential for causing prolonged airport closure resulting in adverse impacts to the airport and to the local, regional, and national economy. The software tool is available in a CD-ROM format and is intended to help develop and document airport business continuity plans or revise current plans in light of this guidance. The CD is also available for download from TRB's website as an ISO image."--Publisher's description.