Write SQL query to solve given problem: What is the gender of the character 'USAF Master Sgt. Epps?'. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T2.gender FROM movie_cast AS T1 INNER JOIN gender AS T2 ON T1.gender_id = T2.gender_id WHERE T1.character_name = 'USAF Master Sgt. Epps'