These Boston high school valedictorians set off to change the world. But good grades only got them so far. Is Boston failing its brightest students? A five-part series about the students left behind.

The story of streetcar 393, which plunged into Fort Point Channel via an open drawbridge in 1916. Forty-six people were killed.

“They thought they were going to change the world,” he says of the 1964 Mississippi Summer Project volunteers. “They didn’t expect that white folks would be so vicious.”

The son of a Red Sox legend, his trail of violent attacks runs back to his teen years. So does the line of judges who somehow saw fit, time and again, to give him one more chance. Now he’s on trial for murder.

When a 26-year-old Chinese entrepreneur pulled over to answer a text message he was carjacked by Boston bombing suspect Tamerlan Tsarnaev. This is what happened that night and how he escaped.

On the people who were working at Logan Airport when the hijacked flights departed:

They are the rarely noticed casualties of the terrorist attacks: the security guard, the ticket agent, the baggage handler on the ramp. They made it home that night, but with images they couldn’t shake, a pain uncomfortable to voice. They can’t believe it has been 10 years. They can’t believe it has only been 10 years.