On Sunday, over 50,000 runners will take part in the 2017 TCS NYC Marathon. Year after the year, the marathon establishes itself as one of the most prestigious races in the world, partially because of how technologically advanced the event is. TCS' Michelle Taylor and New York Road Runners' Julie Schweigert join us to break down all the exciting new technological developments featured at this year's race. The marathon employs its very own app, allowing families to track their loved ones during the race. We learn all about the location-tracking tech used to keep runners and their families informed throughout the big day. Plus, this year will mark the second consecutive NYC marathon using wearable bio-metric tracking sensors. Schweigert and Taylor tell us how this allows the world's top runners to improve their crafts.