Colorado Gives Day, on Tuesday, Dec. 6, 2011, is approaching, and Solar Energy International is remembering instructor Walt Ratterman and his dedication to helping bring solar to the developing world.

Walt brought solar training and humanitarian aid to Rwanda, Uganda, Afghanistan, Benin, Burundi, Pakistan, Kazakhstan, Palestine, the Philippines, Burma, Thailand, Cambodia, Tibet, Ecuador, Peru, Nicaragua, Haiti, and the list goes on. To Walt, humanitarian aid knew no boundaries.