BOSTON (Reuters) - A year ago, Piper Peterson was achingly close to finishing her fifth Boston Marathon, having just turned right onto Hereford Street, when two homemade bombs stopped the race, sending thousands of runners and spectators fleeing the course.
This year, the 67-year-old from Spokane, Washington is one of 36,000 runners - 9,000 more than last year - and an estimated 1 million spectators coming back to the 26.2-mile (42.2-km) course to wipe away the gruesome memories of last year when three people were killed and more than 260 were hurt.