2005 New York City transit strike
The 2005 New York City transit strike, held from December 20 through 22, 2005, was the third strike ever by the Transport Workers Union Local 100 against New York City's Transit Authority and involved between 32,000 and 34,000 strikers. In December 2005, the TWU Local 100 called a strike in New York City.
Source: Wikipedia — 2005 New York City transit strike (CC BY-SA 4.0)