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 and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW