Write SQL query to solve given problem: What are the names of the top 5 airlines with the highest number of aircraft?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T2.Description FROM Airlines AS T1 INNER JOIN `Air Carriers` AS T2 ON T1.OP_CARRIER_AIRLINE_ID = T2.Code GROUP BY T2.Description ORDER BY T1.TAIL_NUM DESC LIMIT 5