A young demonstrator screams in pain as a policeman keeps a firm grip on his finger, while escorting the youth from Central Plaza during an anti-government rally. Units of riot police and soldiers opened fire to break up the demonstration, the latest in a series over the past six weeks.
Date: August 28, 1968
Location: Mexico City, Mexico
Source: Bettmann/Corbis/AP Images
Photos downloaded from the Essential Lens site are cleared for educational use only.