The Pittsburgh Steelers built a brand on defense for the better part of the last half-century. From the “Steel Curtain” in the 1970s to “Blitzburgh” in the 1990s and 2000s, the Steelers have dominated opponents through their defensive fronts. If the line of scrimmage were a medieval battleground, then Steelers linebackers and defensive linemen would be like armored knights mounted on horses charging against helpless, unarmed peasants. Names like Mean Joe Greene, Jack Lambert, James Harrison, and James Farrior struck fear into any opposing offense. It’s been a while since the Steelers fielded a unit capable of imposing this level of dominance on the line of scrimmage, but this year’s team might have what it takes.