Write SQL query to solve given problem: Among the products that are no longer in continuous production, how many of them have their supplier in the USA?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT COUNT(T1.Discontinued) FROM Products AS T1 INNER JOIN Suppliers AS T2 ON T1.SupplierID = T2.SupplierID WHERE T2.Country = 'USA' AND T1.Discontinued = 1