Ключевые слова: 2021, ashland, athlete, autumn, blind, blurred motion, boston, boston massachusetts, boston marathon, competition, disability, duo, fall, guide support, handcycle, handicapped, hopkinton, impairment, jogging, marathon, massachusetts, men, motion, natick, newton, oct 11, october, para athletics, runner, running, spectator, speed, sport, track and field, visually impaired, volunteer, wellesley, wheelchair, women,