  Research, education and training in high energy physics (HEP) often draw
international collaborations even when priorities and long term visions are
defined regionally or nationally. Yet in many developing regions, HEP
activities are limited in both human capacity and expertise, as well as in
resource mobilisation. In this paper, the benefits -- to the U.S. HEP program
-- of engagements with developing countries are identified and studied through
specific examples of Africa and Latin America; conversely, the impact of HEP
education and research for developing countries are also pointed out. In the
context of the U.S. strategic planning for high energy physics, the authors
list recommendations on investments that will benefit both developed and
developing nations.
