They got on the Red Line at JFK-UMass on the kind of postcard-perfect Sunday afternoon in early September that you always hope that Boston is going to have.

The sun was lemonade yellow overhead. The sky was a piercing blue. And there was just enough of a snap in the air to remind us that, while fall isn’t on our doorsteps quite yet, it’s parking the car and eyeing the distance up the front walk.

See Full Page