The photo is one of those "strange but true" news items that points up the difficulties the Army is having in getting recruits. It comes from the article link. It is not meant to disparage either the recruiters in the photo or the serving members of the U.S. military. The "all voluntary" army is a nice way of saying a standing army. America has a long tradition of opposition to a standing army. Apart from the Founders' fears of a military coup, which I regard as infinitely unlikely, a standing army becomes its own sub-culture, one which grows increasingly distinct from the population as a whole. The photo epitomizes that gulf. I also think it is funny - not the soldiers, the kid!