Runners crossing the Verrazzano-Narrows Bridge at the start of the New York City Marathon in 1981.
The numbers speak for themselves: 50,000 runners, 5 starting waves, 250 gallons of Gatorade concentrate, and 1,500 portable toilets.
The first Sunday in November is a sight to behold in New York City- a global army of men and women converging on the Staten I…