CAMPBELL, Ohio — Forty years ago, on Sept. 19, thousands of men walked into the Campbell Works of Youngstown Sheet and Tube along the Mahoning River before the early shift.

Like every fall morning, they were armed with lunch pails and hard hats; the only worry on their minds was the upcoming Pittsburgh Steelers game on “Monday Night Football.” The only arguing you heard was whether quarterback Terry Bradshaw had fully recovered from the dramatic hit he took from a Cleveland Browns player the season before.

It was just before 7 a.m., and the fog that had settled over the river was beginning to lift. As the sun began to streak through the mist, the men made their way into the labyrinth of buildings where they worked.

In the next hour, their lives would change forever.

From then on, this date in 1977 would be known as Black Monday in the Steel Valley, which stretches from Mahoning and Trumbull counties in Ohio eastward toward Pittsburgh. It is the date when Youngstown Sheet and Tube abruptly furloughed 5,000 workers in one day.