A soldier guards the Tomb of the Unknowns at Arlington National Cemetery in Virginia. Note the presence of devices on the soldier's shoes that produce the distinct clicking sound when the soldier changes direction.
Ben Schumin is a professional photographer who captures the intricacies of daily life. This image may be used under Creative Commons Attribution-ShareAlike 2.0. Please provide artist attribution, as well as a link to the original photo and to the license terms.