FIERCE HOMELAND SECURITY – Cultural differences can be a key hurdle in responding to chemical, biological, radiological or nuclear incidents in foreign countries, says a report from the National Research Council. The United States sometimes helps respond to major CBRN incidents abroad, such as the Fukushima nuclear disaster in 2011. Aside from humanitarian motivations, the United States also has a stake in the response to major incidents in order to avoid instability and outbreaks of violence. Continue reading.