A GPS-equipped baton is being carried across the U.S. in the 3,300-mile One Run for Boston. The coast-to-coast relay is raising money for the One Fund Boston, which benefits survivors of the Boston Marathon bombings and the families of those who were killed.

It began in Santa Monica, Calif., on Sunday and ends on April 13 at the marathon finish line in Boston. But the run actually began in the U.K. last year when three British 30-somethings watched the bombing coverage on television and decided they had to help. They raised $91,000 with their first run last June and are hoping to raise a million this time.

Photo captions and interview with two of the founders here