52. images used:
1.A window that's seen better days by Unhindered by Talent
http://www.flickr.com/photos/nicmcphee/2464470095/
2.chess board spwelton
http://www.flickr.com/photos/spwelton/5498883296/
3.Rugby Scrum by Paolo Camera
http://www.flickr.com/photos/vegaseddie/1471251541/
4.Construction continues on USAREUR command, battle center in Wiesbaden By USACE Europe District
http://www.flickr.com/photos/europedistrict/4817509535/