In 2006, six people died in an accident on the Bronx River Parkway near the site of Sunday's crash.

CNN: Vehicle flips, 7 die near Bronx Zoo

It was a chance visit (prompted by her errant dog, Xena) to an illegal dumping ground by the Bronx River that proved to be Carter's environmental tipping point.

CNN: Blazing a green trail through the Bronx

The Bronx River was one of our first projects.

CNN: Commentary: Green way to create jobs, save cities