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The timeline can be navigated with the “Scroll Left” and “Scroll Right” buttons or by dragging the pointer to a date on the timeline bar (located at the bottom of the screen on the desktop version and on the left of the screen on mobile). To filter by a specific topic and see a smaller group of memory points, make a selection on the dropdown “Filters” menu or click “Search” to do a keyword search. Hover over the abbreviated filter tags in the blue boxes to see the complete title of the filter, or click a filter to display all the memory points with this tag. If you want to take a deeper dive into a particular topic by reading a narrative essay and viewing a curated timeline, click on “Stories.”

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The Internal Revenue Service allows companies to operate in Puerto Rico without paying taxes.

Date: 1976

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For the next 30 years, American pharmaceutical companies will take advantage of this tax policy to build higher profits for their products.