https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12322327![Bulls in the yoke in front of a refinery. Puerto Rico. Sourced from the Library of Congress.](https://images.rawpixel.com/image_social_square/cHJpdmF0ZS9sci9pbWFnZXMvd2Vic2l0ZS8yMDIyLTA0L2xvYzIwMTc3NjQ1ODgtaW1hZ2UuanBn.jpg)
![Bulls in the yoke in front of a refinery. Puerto Rico. Sourced from the Library of Congress.](https://images.rawpixel.com/image_social_square/cHJpdmF0ZS9sci9pbWFnZXMvd2Vic2l0ZS8yMDIyLTA0L2xvYzIwMTc3NjQ1ODgtaW1hZ2UuanBn.jpg)
Bulls in the yoke in front of a refinery. Puerto Rico. Sourced from the Library of Congress.
Bulls in the yoke in front of a refinery. Puerto Rico. Sourced from the Library of Congress.
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