Big Boy locomotive chugs through Westmoreland, Allegheny counties

The world's largest operating steam engine moved its way through Western Pennsylvania on Saturday, with many sharing the excitement with Pittsburgh's Action News 4!

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This is a stored Optics snapshot.It preserves the source map and wording analysis from 7/12/2026, 2:14:33 AM.

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What happenedThe world's largest operating steam engine moved its way through Western Pennsylvania on Saturday, with many sharing the excitement with Pittsburgh's Action News 4!.

What changedThe center frames it as "Big Boy locomotive chugs through Westmoreland, Allegheny counties". The right frames it as "Big Boy locomotive chugging through Westmoreland, Allegheny counties".

ConfidenceLow. Two-source or narrow-bucket comparison.

Archive healthDeveloping · 2 sources · 2 buckets

WORDING GAP

23WORDING GAP

2 sources · 2 bias buckets · Low confidence

Still Watching. The center frames it as "Big Boy locomotive chugs through Westmoreland, Allegheny counties". The right frames it as "Big Boy locomotive chugging through Westmoreland, Allegheny counties".

SOURCE MAP TIMELINE

Jul 11, 9:35 PM: Pittsburgh Tribune Review joined the source map.

Jul 11, 10:50 PM: WTAE Pittsburgh (Hearst) joined the source map.

Now: Wording Gap is 23/99 and story health is developing · 2 sources · 2 buckets.

ARCHIVED SOURCES

Center ·News report

WTAE Pittsburgh (Hearst)2h ago

Big Boy locomotive chugs through Westmoreland, Allegheny counties

chugs

The world's largest operating steam engine moved its way through Western Pennsylvania on Saturday, with many sharing the excitement with Pittsburgh's Action News 4!

Open source

Center-right ·News report

Pittsburgh Tribune Review4h ago

Big Boy locomotive chugging through Westmoreland, Allegheny counties

chugging

The world’s largest operating steam engine, Union Pacific Big Boy 4014, is on the East Coast of the United States for the first time in history.

Open source