What weapon on this Earth is capable of wiping out millions of people instantly? The first thing most people will think of is nuclear weapons, but biological weapons are an even greater threat. A viral epidemic has the potential to kill millions of people in a matter of weeks. Movies like "Outbreak" have vividly depicted the death and destruction that a virus can cause. A warring nation may intentionally and deliberately use weapons containing viruses against their enemies. A common method of accomplishing this is to fill a missile with viruses and detonate it high above a city, spreading the virus quickly and efficiently. On a large scale, an entire population can be wiped out.