We have to find ways to function comfortably in the world, and at reasonable cost, despite the revolution in terror tactics pioneered by al Q'aeda (Kash is right).
Getting the security review of foreign investments right is an important part of this. The review process has to provide a politically viable vetting of potential security issues, and an opportunity to address potential problems without necessarily stopping a deal. The review has to be conducted in a timely manner.
So a review of the review process is important. The Dubai Ports World controversy provides a good opportunity.