How does FEMA define a major disaster for the purpose of making a declaration?

FEMA follows strict guidelines when making a major disaster declaration. As a result of these guidelines, a major disaster declaration by FEMA is not available for all terrorist incidents, such as a bioterrorist attack. On the basis of your knowledge on the topic, answer the following question: How does FEMA define a major disaster for the purpose of making a declaration? Do you think a major disaster declaration should be available for all disasters? Why or why not?