Running of the New York City Marathon this Sunday it comes of course after what happened in Boston earlier this year. And at the finish line those 45000. Runners noticing a yellow line of inspiration... See More
Running of the New York City Marathon this Sunday it comes of course after what happened in Boston earlier this year. And at the finish line those 45000. Runners noticing a yellow line of inspiration to guide them that was in honor of the victims in Boston. And tour the -- today twin Brothers wonder twins as we call -- a moment ago both have autism both have incredible determination. Tonight proving they are American strong here's ABC's Lindsay -- Today is -- three year old identical twins Alex and Jamie Snyder's first New York City Marathon. -- yeah. If they are autistic and on. Able to communicate through then running as a -- Therapy this is our number one main. Activity at the family everything else kind of come second to the -- running Alex -- as fast as it runs with a potent jet set a new personal back. Three -- 35. -- alone. For Janie who runs with his dad Allen the memory of the Boston Marathon happening today a struggle. There was a lot of foreign and screaming and animated people around -- and. Traumatized. But Robin Ann Allen are -- -- -- to help Jamie get back to the races that have given him and his brother so much joy. They don't live a normal life so -- This something that really mean anything connects with the men. Makes them happy and just as we came to where Jamie finished in North America -- Robin -- Allen -- enjoy running brings to the entire family has been their greatest blessing. And -- Janice ABC news New York. We salute Alex and -- tonight -- cross that finish line and thousands of others who did today as well.
This transcript has been automatically generated and may not be 100% accurate.