The photo above is of the Church of the Holy Sepulchre, the site where Christians believe Jesus was buried. It's only a stones throw away from the Western Wall, which is just a stairway away from the Dome of the Rock. It's a volatile situation.
The Wall is the physical location of the first two Hebrew temples, the spot where in 70 A.D. the Romans destroyed the second temple. The top of the wall; and the Dome of the Rock; is the spot where tradition holds that the Prophet Muhammad ascended to heaven. The Jewish people believe that a third temple will rise there someday. The Christians expect the Apocalypse to begin there, as foretold in Revelations.