Lance Cpl. Nicholas Powell, a Marine with 1st Battalion, 12th Marine Regiment, prepares to throw the Unmanned Aerial System at Marine Corps Training Area Bellows, Hawaii, March 8, 2017. The UAS is mainly used for aerial reconnaissance and can also be used for observation, local security, targeting, and prosecuting. - Lance Cpl. Nicholas Powell, a Marine with 1st Battalion, 12th Marine Regiment, prepares to throw the Unmanned Aerial System at Marine Corps Training Area Bellows, Hawaii, March 8, 2017. The UAS is mainly used for aerial reconnaissance and can also be used for observation, local security, targeting, and prosecuting.