Great story on NECN! Your son is adorable, and you are an inspiration. I've done Boston several times (with the Dana Farber team), but this year I will be a spectator. (I'll be at 15.5, in Wellesley before Lower Falls. I will look out for you, now that I know what you look like from the video.)
Good luck on Monday!! (Supposed to be good weather - high 40s - let's hope for a tailwind!).