Arnie Bernstein: During my runs through Catholic cemeteries, I leave stones on Jewish graves. I’m running Kaddish. By Arnie Bernstein 2:24 PM Stones placed atop the gravestone of philosopher Moses Mendelssohn at the historical Jewish cemetery in the district Mitte in Berlin in 2008. (Markus Schreiber / ASSOCIATED PRESS) When I first started running a few years ago, I looked for quiet roads without traffic, crosswalks, stoplights, train crossings and other roadblocks to urban runners. I fortunately live in Chicago, a city rich in cemeteries. Within a 10-mile radius of my house, there is a trove of necropolises well suited...