On our way to the ceremony unveiling the plan for the five-block Star Tribune property in Downtown East, my son Shaw and I got off the train at the Downtown East/Metrodome station and I was asked directions by an older couple. They were looking for Periscope, the ad agency, at 10th and Washington. Obliging, I agreed to walk with them from the platform across 4th Street, where I would point the way to Washington and bid them adieu. We stood waiting for the Walk signal to get across 4th Street and I detected a murmur from them as nothing was happening;…