By Joseph De Avila, Andrew Grossman and Eliot Brown
Taylor Umlauf/The Wall Street Journal
A recent aerial view of the World Trade Center site.
Hundreds of unionized concrete workers walked off the job at the World Trade Center on Monday, setting up for a possible strike in the coming days.
The contract covering the workers expired on July 1. Since then, the concrete workers have been operating without a new contract.
Officials [...]
