Question: How many flights from American Airlines were cancelled due to a type A cancellation code?
SQL: SELECT COUNT(*) FROM Airlines AS T1 INNER JOIN `Air Carriers` AS T2 ON T1.OP_CARRIER_AIRLINE_ID = T2.Code WHERE T1.CANCELLATION_CODE = 'A' AND T2.Description = 'American Airlines Inc.: AA' AND T1.CANCELLED = 1