Scott Brown is chasing the political limelight again with a seemingly improvised Senate campaign.

© Aleksandra Michalska/Reuters

In Massachusetts, the octogenarian senator Ed Markey faces a challenge from a much younger centrist, Representative Seth Moulton.

© Mel Musto for The New York Times

Travis Fuller was from my hometown. I went back and talked with his family about how they made sense of his death, 25 years after Sept. 11.