Black swan events have no historical precedent to warn us to be prepared; yet, as seen in the 9/11 attacks, they are not entirely unforeseen and general preparation is possible even though their rarity makes it difficult to gather widespread support. Military culture is particularly inoculated against accepting that anything cannot be prepared for, or if it does catch us by surprise, that it cannot be recovered from. Yet even the military is awakening to the growing probability of such events as chemical or biological or other attacks. Low-cost and adaptive measures must not be overlooked as DOD strives to be ready to respond to a broad range of possibilities rather than keying in on anything specific.