This document was declassified by the Central Intelligence Agency (CIA), and was originally published about 10 months after the 9/11 attacks. The document describes the report as the following:
This Intelligence Community Assessment responds to requests from the Joint Theater Air and Missile Defense Organisation of the Department of Defense and the Transportation Security Administration of the Department of Transportation.
This Assessment examines both terrorist and state threats to facilities and people in the US homeland using most types of air, vehicle and associated weapons, including land attack cruise missiles. This assessment does not cover ballistic missile threats.
We define the US homeland as all 50 states, the District of Columbia. Puerto Rico, the US Virgin Islands, Guam, American Samoa, and the various trust territories in the Pacific. The intelligence reporting we cite illustrates our concerns but is not an exhaustive listing.
This Assessment focuses on the next five years, although in some instances longer projections are offered when intelligence information and analysis warrant.