... by the committee. In particular, the excellent effortsof the Lykken/Siegrist subpanel of the High Energy Physics Advisory Panel werevery helpful.Finally, the committee thanks the staff of the ... 97 4THE STRATEGIC FRAMEWORK 101 The Scientific Challenge, 101 The Position of the U.S. Program, 102 The Strategic Principles, 104 The Budgetary Framework, 111Recent Trends in Support for the ... is the nature ofspace and time? What are the origins of mass? How did the universe begin? Howwill it evolve in the future? The next few decades could be one of the most excitingperiods in the...