Retired Sgt. Maj. Mike Zacker, Secretary of the Board of Directors and docent at the Flying Leatherneck Aviation Museum and Historical Foundation, poses for a photo in front of an HRS-1 at the museum aboard Marine Corps Air Station Miramar Calif., Sept. 10. Zacker spent 18 of his 30 year career working on the HRS-1 and similar helicopters. - Retired Sgt. Maj. Mike Zacker, Secretary of the Board of Directors and docent at the Flying Leatherneck Aviation Museum and Historical Foundation, poses for a photo in front of an HRS-1 at the museum aboard Marine Corps Air Station Miramar Calif., Sept. 10. Zacker spent 18 of his 30 year career working on the HRS-1 and similar helicopters.