Photos: Signs of the times

A Yemeni anti-government protester attends a parade marking the anniversary of Yemen's reunification on the sidelines of a daily demonstration calling for the ouster of President Ali Abdullah Saleh in Sanaa on May 22, 2011.</p>

A Yemeni anti-government protester attends a parade marking the anniversary of Yemen's reunification on the sidelines of a daily demonstration calling for the ouster of President Ali Abdullah Saleh in Sanaa on May 22, 2011.

KANDAHAR, Afghanistan — On military installations in Afghanistan, in every direction you look there are printed words: on banners tacked to buildings, spray painted on equipment, written on the walls of porta-johns and carved into concrete.

Some of the signs are meant to be serious but come across as jokes, some are meant to be jokes but contain useful information, and most are a mix of the two. And sometimes you find a pamphlet about finding God in the PTSD battle under a belt of machine gun ammo on a picnic table.