As a follow-up to my photo collection published in The Atlantic's January 2012 issue (and online), I put out a call for reader photographs with the theme of "America at Work." The response was fantastic. People sent in images from Guam to Massachusetts, and from Florida to California. The photos depict a wide range of jobs, giving a glimpse of what it means to be employed in 21st century America. Many, many thanks to the contributing photographers, and to those who helped spread the word. Both the images and captions come from the photographers.