The Hammer Strike Heard Across America | Transcontinental Railroad Completed

May 10th, 1869 — a single hammer strike at a remote spot in Utah triggered what may have been America's first coast-to-coast live broadcast, decades before radio existed. This is the story of the Transcontinental Railroad: the rivalry, the labor, and the moment that connected a continent. 🔔 Subscribe and turn on notifications for more "What Happened That Day" episodes. What do you think deserves more credit, the engineers who designed the railroad, or the laborers who built it with their hands? Let us know in the comments. #history #usahistory #transcontinentalrailroad #goldenspike #1869 #onthisday