As a concept and agenda maritime security has evolved since the late 1990s and early 2000s. In particular concerns over terrorist attacks on port facilities sparked new security interests in the maritime domain. Notable events influencing the maritime security paradigm are the USS Cole bombing in 2000 and the September 11 attacks in 2001. Several states and international organisations have since outlined maritime security strategies. Many best practices and standards regarding physical maritime security like the ISPS Code from 2002 as a consequence of the attacks have been published by regulating authorities or the maritime industry. In the light of the perceived terrorist threat, the scope of the maritime security concept began to broaden from the narrow focus on interstate military confrontation to include other issues. (See also critical security studies)