In your opinion, which of these possibilities represents the greatest threat to the United States? Why?

Module 5 lists seven major issues that can have a significant impact on homeland security

Weapons of Mass Destruction

Economic Disparity and Social Fragmentation

Water Security, Food Security, and Energy Security

Decreased National and Multinational Solidarity

Unrest Across the Globe

Demographic Change

Cyberthreats

In your opinion, which of these possibilities represents the greatest threat to the United States?  Why?