Echelon Shots

We were thinking about filming some shots of a group of people singing the choral parts of Vox Populi. I think this would give the video a more authentic feel and make it more like one of 30 Seconds To Mars' videos. I also think that this could be the Echelon- always included in 30STM' music videos. We thought of doing this on a green screen so that we could use one of these images of War memorials in the background: