Tunneling to the FutureA look into the 1913 subway expansion project that "proved the city's physical salvation" In 1910, New York City was bursting at the seams as more and more people crowded into a limited supply of housing in the tenement districts of Manhattan and the older areas of Brooklyn. With no outlet for its exploding population, and the burgeoning social problems created by the overwhelming congestion, New York faced a serious crisis which city and state