Certain missile is a term used to describe a type of weapon system that is designed to deliver an explosive payload over a long distance. The most common types of certain missiles are the SCUD, PATRIOT, TITAN, and SAM. The SCUD is a short-range ballistic missile developed by the Soviet Union during the Cold War. The PATRIOT is a medium-range surface-to-air missile system developed by the United States. The TITAN is an intercontinental ballistic missile developed by the United States during the Cold War. Finally, the SAM is a surface-to-air missile system developed by the Soviet Union.