U.S. Army Command Sgt. Maj. John Wayne Troxell, senior enlisted advisor to the Chairman of the Joint Chiefs of Staff and Secretary of Defense, greets Master Sgt. Erika Williams, 601st Air Operations Center Plans Division, upon arrival to an Air Forces Northern professional military development event here. Troxell was visiting as the keynote speaker for “Technical Sergeants Involved & Mentoring Enlisted Airmen,” April 24. During his remarks, Troxell, also the senior noncommissioned officer in the U.S. Armed Forces, encouraged TIME participants to develop into leaders who strive daily to set the example for subordinates by demonstrating selfless dedication to established military standards. (Air Force photo by Mary McHale)