caption: The image shows a large group of people standing in front of a metal fence, with some wearing caps. There are trees and buildings with windows in the background, as well as vehicles on the road. On the right side of the image, there are steps with railings and boards with poles, and flags with poles. In the background there is a sky with clouds. This image is likely related to the Boston Marathon bombing, as it is a reminder of the tragic event that occurred in Boston, Massachusetts.