public needs to understand that the resources to deal with the most likely disasters pay for most of the risks the city faces. Terrorism is an added cost because it introduces different threat patterns.
The technical strategy must attempt to maximize dual benefits to economy and security through the development of appropriate technologies and procedures. To the extent that costs of vulnerability reduction can be reduced or offset by improved quality of infrastructure services, the public will be more willing to support investments to mitigate very unlikely but high-consequence events.
As cities work to become both safer and more secure, there are opportunities for international collaborative learning between megacities. Because the analytical work is so complex, a pair of major cities such as Moscow and Los Angeles might find that engaging the two academies of sciences as partners in such collaboration to be mutually beneficial.