List of roller coaster rankings - Wikiwand
Pittsburgh Steelers players are among first to ride Kennywood's new Steel Curtain roller coaster
Felt like my head was in the clouds.' The Steel Curtain lives up to its name
List of roller coaster elements - Wikipedia
Steel Curtain - Coasterpedia - The Roller Coaster and Flat Ride Wiki
Steel Curtain - Coasterpedia - The Roller Coaster and Flat Ride Wiki