The Critical Issues Forum (CIF) is a cooperative education program supported in part by the Department of Energy's Defense Programs. The Science and Technology Education Program (STEP) at Lawrence Livermore National Laboratory manages one component of this program. CIF engages high school students and teachers regarding issues of the proliferation of weapons of mass destruction, arms control, and international security. These issues are viewed in light of their scientific, economic, socio-cultural, and political/geopolitical influences and implications. This year CIF's focus is on chemical and biological weapons (CBW). CBW is becoming more of a threat today than ever before. Many countries are developing these weapons. CBW also presents certain ethical dilemmas for many individuals, especially if those individuals feel it is their religious duty to use or avoid the use of such weapons. Religion has become an important determining factor in international security because many cultures, and even governments make decisions based on religious traditions. This paper is an attempt to look at these religions and philosophical traditions with an emphasis on views of 'just war.' The ultimate purpose of this paper is to promote awareness about religion's influence on international security issues.