<p><img src="https://th-thumbnailer.cdn-si-edu.com/4JNJblQ6Sf88C6Wc5jH0aPWy0sQ=/fit-in/1600x0/filters:focal(958x548:959x549)/https://tf-cmsv2-smithsonianmag-media.s3.amazonaws.com/filer_public/e5/46/e546a24a-94be-4def-9605-0cef79c7adc6/big_boy_no_4014_on_display_in_philadelphia.jpeg" alt=""/><br />
< img src=" https://th-thumbnailer.cdn-si-edu.com/4JNJblQ6Sf88C6Wc5jH0aPWy0sQ=/fit-in/1600x0/filters:focal (958x548:959 x549)/ https://tf-cmsv2-smithsonianmag-media.s3.amazonaws.com/filer_public/e5/46/e546a24a-94be-4def-9605-0cef79c7adc6/big_boy_no_4014_on_display_in_philadelphia.jpeg" alt =" "> Built in the 1940s, Big Boy No. 4014 retired in 1961 after traveling for more than one million miles. It&#8217;s now making its method across the country in honor of America&#8217;s 250th birthday<br />
<br /> <a href="https://www.smithsonianmag.com/smart-news/the-largest-operating-steam-locomotive-in-the-world-weighs-1-2-million-pounds-now-the-historic-train-may-be-coming-to-your-town-180989112/" target="_blank">Source</a></p>
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