A dirty bomb is a weapon that combines explosives with radioactive material to spread harmful radiation over a wide area. Such weapons are a threat to national security and can cause serious damage to both property and human lives. However, there are alternative terms that can be used to describe such weapons, including radiological dispersal device (RDD), radiological weapon, and nuclear dispersal device (NDD). These different names are used to describe the same thing, but they serve different purposes. While people may use different terms, it is important to understand that such weapons pose a significant risk to public safety and must be prevented at all costs.