Updated On: 17 April, 2013 04:55 AM IST | | Agencies
An exhausted Bill Iffrig, who was competing in his third Boston Marathon, was yards from the finish line when the explosion was detonated.
Visuals show Iffrig’s legs being swept out from under him by the impact of the explosion.u00a0
A race official helped him back to his feet, and Iffrig, determined to reach his goal, went on to finish the race.