I didn't understand the connection to the challenge at first. Then I saw that it looks like the grave was recent, and I'm thinking that's how it meets the challenge.
Hmmmmm... the subject mater is great. Im not so sure about the people being so far right. Bringing them left a bit would allow a better utilization of the rule of thirds. And I dont think Im so crazy about the car in the background. Other than that, its good.