The Director of National Intelligence, James Clapper, has delivered a statement for the record to the US Senate Select Committee on Intelligence outlining the worldwide threat assessment of the US intelligence community.
From the introduction:
This year, in both content and organization, this statement illustrates how quickly and radically the world—and our threat environment—are changing. This environment is demanding reevaluations of the way we do business, expanding our analytic envelope, and altering the vocabulary of intelligence. Threats are more diverse, interconnected, and viral than at any time in history. Attacks, which might involve cyber and financial weapons, can be deniable and unattributable. Destruction can be invisible, latent, and progressive. We now monitor shifts in human geography, climate, disease, and competition for natural resources because they fuel tensions and conflicts. Local events that might seem irrelevant are more likely to affect US national security in accelerated time frames.