Addressing mandates and legislation introduced since the first edition, this new edition of an essential text identifies the role the private sector plays in securing our homeland and offers strategies to aid in the fight against national and international threats. It includes updates to the NIPP (National Infrastructure Protection Plan), new case studies of both proper security policies and procedures in practice versus costly security breaches, a toolkit for improving a company‘s security posture, and new measures to assess and address vulnerabilities and threats.