Gunnery Sgt. Joseph Lassendrello, an instructor with noncommissioned officer development team, Command Element, Black Sea Rotational Force 12, listens as the Bulgarian Joint Forces Command Sergeant Major, addresses the Marines prior to beginning a five-day NCO development course, May 15 at Veliko Tarnovo, Bulgaria. The NCO development team is a mobile detachment of instructors tasked with mentoring the NCOs and officers of US partner nations in the fundamentals of leadership, to include: the roles of NCOs and officers, small-unit leadership, decision-making procedures, military professionalism and operational proficiency.