The Ones Who Hit the HardestBy: Chad Millman, Shawn Coyne A stirring portrait of the decade when the Steelers became the greatest team in NFL history, as their city was crumbling around them. In the 1970s, the city of Pittsburgh was in need of heroes. In that decade the steel industry, long the lifeblood of the city, went into massive decline, putting 150,000 steelworkers out of work. And then the unthinkable happened: The Pittsburgh Steelers, perennial also rans in the NFL,