At the dawn of the 21st century, elementary particle physics is poised to address some of the most basic questions in science. Obtaining the answers to these questions will require a global effort of great scale and complexity. The committee is charged to construct a plan for U.S. participation in this effort. In particular, the committee will
Identify, articulate, and prioritize the scientific questions and opportunities that define elementary particle physics.
Recommend a 15-year implementation plan with realistic, ordered priorities to realize these opportunities.