This is a picture of the Ozumba Bridge in Mexico, which was built from 1885-1895. In this photo there are 7 Mexican men on horseback in the lower right corner who appear to be soldiers. There are also a few men standing on top of the train cars and others sitting in one of the train cars. The train is not moving and is on a bridge. The bridge is held up by columns that are made of brick and metal. There are a few men in all white that are sitting or hanging on the column like structures. The terrain is rugged and there is a cliff to the right and left. The terrain in the center of the image is dry and rocky. There are small shrubs, bushes, and plants. Towards the back of the photo there is a group gathering with a nun in front. There are also a few houses and multiple trees. It seems as though the men in the white are the workers and the group on horseback towards the bottom right are giving orders. The construction of this railroad seems to be complete. I would like to know what the roles of each of the men are. I would also like to know why they are in all white. I am curios to know how strenuous the work was and how many workers it took to complete the railroad.