Cyberinfrastructure for homeland security: Advances in information sharing, data mining, and collaboration systems

In summary, the special issue papers address very interesting and relevant issues related to Cyberinfrastructure for homeland security. It has been a privilege to guest edit this issue and be involved in the intellectual endeavors of researchers at the fore front of these efforts. We especially thank Professor Andrew Whinston, Editor-in-chief of Decision Support Systems, for giving us this opportunity and thank all the reviewers for their diligent effort in ensuring the quality of the papers. We thank all the authors for contributing their work to the special issue and bearing with us on some delays in the review process. We hope the readers share our enthusiasm for the papers published in this issue and for their relevance in advancing novel innovations in information systems specifically targeted to counterterrorism efforts.