NYC subways opened October 27, 1904. Below are some articles and videos about the NYC subway. Scheduled to open by December of 2016, the Second Avenue subway is running into some rough spots and delays.
New York City Subway Opens
New York City Subways
New York City Transit - History and Chronology
Build It Bigger: Rebuilding New York City's Subway
16 things you didn’t know about the NYC subway
New York Subway 1905
New Subway Line Is Chugging Along
Good and Bad News on Second Avenue Subway
Inside New York City's East Side Access, the biggest transportation project in America
The Launch Box
Baby, Baby, Where Did Our Love (or Second Avenue Subway Money) Go?
Why New York Subway Lines Are Missing Countdown Clocks
Google: nyc subway construction projects