http://www.apimages.com/metadata/Index/YE-Obama-Police-Memorial/1d0c6dbac59b46a1896d5c9bebdeb96e/147/1
The picture is a great example of vantage point/angle of view. The height comparison between the men and the building shows where the position of the photographer could be. Instead of shooting at eye level, it is done lower to the ground shot upward.
