Union Pacific's Big Boy Steam Locomotive Embarks on U.S. Tour

WHO:

CBS News US - Union Pacific is the organization sending Big Boy on a tour.

CBS News Tech - David Pogue is the correspondent visiting Steamtown National Historic Site.

WHAT:

CBS News US - Big Boy is described as the largest, heaviest, and most powerful steam locomotive in the world.

CBS News US - Big Boy is touring the U.S. as part of America's 250th birthday celebration.

CBS News Tech - Big Boy is noted as the biggest functioning steam train in the world.

WHERE:

CBS News Tech - Steamtown National Historic Site is located in Scranton, Pennsylvania.

WHY:

CBS News US - The tour of Big Boy is part of the celebration for America's 250th birthday.

HOW:

CBS News US - Union Pacific is organizing the tour across the country.

(UPDATED June 29, 2026 04:21 UTC)

Big Boy, the largest, heaviest, and most powerful steam locomotive in the world, is currently touring the U.S. as part of the celebration for America's 250th birthday, organized by Union Pacific. David Pogue is visiting Steamtown National Historic Site in Scranton, Pennsylvania, where Big Boy is noted as the biggest functioning steam train in the world. This tour is a significant highlight in the festivities honoring the nation's milestone anniversary.