Definite tension
Well, there's definitely more security out there: this am as I got off the train in Grand Central, there were cops and National Guard on the platform watching everyone coming off the train. As we walked up the ramp to the GCT lower level, there were a couple of NYPD K-9 guys with dogs as well, standing in front of a line of people waiting to go down and board the empty train. Oddly enough, there was much less police presence in the subway station, leading me to think that maybe something was up on that platform. I felt both frightened and comforted by their presence.