At the west end of the National Mall in Washington, D.C., the Lincoln Memorial stands in tribute to President Abraham Lincoln. It’s not only a reminder of one of our history’s greatest figures, but a place of celebration, education and demonstration. In times of trouble and of peace, the National Mall has served as America’s symbolic front yard and the eyes of Lincoln’s statue have kept watch over our unfolding history. Photo by Yu Sheng (http://ift.tt/18oFfjl).