U.S pilots of the 2nd Assault Battalion, 2nd Aviation Regiment, 2nd Combat Aviation Brigade, along with the 601st and 602nd Aviation Battalion, 2nd Aviation Brigade, Republic of Korea Army Aviation Operational Command ready themselves for one of the largest combined air assaults of the year on the Korean peninsula Oct. 30, 2013, at an undisclosed location. U.S. and ROK UH-60 Black Hawk Helicopters line the runway prior to initiating the exercise.