20 Most Powerful Photographs Ever Taken
4. Terri Gurrola hugs her tiny daughter after serving in Iraq for 7 months.
3. Robert Peraza, who lost his son Robert David Peraza in the attacks at the World Trade Center, pauses at his son's name at the North Pool of the 9/11 Memorial before the 10th anniversary ceremony at the site on Sept. 11, 2011, in New York.
