The marathon holds extra meaning for some New Yorkers running on Sunday.
For Fort Greene resident Danielle Hacet, 31, running this marathon is a testament to her recovery from brain surgery in July 2015.
George Campbell, 63, runs in honor of his late wife, who ran the marathon in 1978.
There will be tens of thousands of runners on Sunday, and they each have different reasons for participating. Here’s a look at four New Yorkers and what is driving them to the course.