Well, first off Goodyear makes ST tires at several plants. The plant that made mine is in Gadsden, Alabama (code MD).
Additionally, Goodyear puts their name and reputation on the line when they brand tires made in other countries and so inspects them to the same standards as their American and Canadian made tires.
This is different than the "No Name" or "Never heard of Brand" tires sold at some discount houses. Although they too must meet DOT standards, government inspectors are responsible for compliance; not company QA inspectors who are representing their company and are held accountable for what is delivered to the customer.
Lou, Laura, & Freya the wonder dog
2008 GMC Sierra 3000HD Crewcab SB Allison Duramax
2019 Flagstaff 8529FLS - Pullrite 3300
HAM CALLSIGN - KC3FFW