Find the 13 differences between the original photograph, top, and the altered photograph, center. Answers at bottom. For more Second Glance puzzles, click here.

Original photo by Washington Post reader David C. Kennedy; Shenandoah Bicycle Co. in Harrisonburg, Va., in July. Correction: An earlier version of this puzzle solution did not include a 13th difference. In the altered photograph, the bicycle mechanic on the left has different-colored shoes. This solution has been updated.