What are these pictures on the side of buildings in my neighborhood?

In 2007 the AJA Project created IN+graiN, a large-scale exhibition of over 70 photos taken by refugee and immigrant youth in Southeast San Diego, which is home to the largest refugee population in the state of California.Watch a video about the project that includes reactions from neighborhood residents who encountered the photographs.[youtube=http://www.youtube.com/watch?v=HQG2TEAkggo&tracker=False &w=320&h=240]