 Complete the following phrase:  The book is primarily an account of the Smallpox Eradication Program 19671980, the ongoing perception by the U.S. government that smallpox is still a potential bioterrorism agent, and the controversy over whether or not the remaining samples of smallpox virus in Atlanta and Moscow the demon in the freezer should be finally destroyed. However, the writer was overtaken by eventsthe a href911911a attacks and the 