Mark Geletko, retired Marine Corps Sergeants Major, grew up in housing projects surrounded by a large family presence. He developed a strong passion for sports and physical activities at a young age which followed him into his adult years. (U.S. Marine Corps photo by Lance Cpl. Jennessa Davey) - Mark Geletko, retired Marine Corps Sergeants Major, grew up in housing projects surrounded by a large family presence. He developed a strong passion for sports and physical activities at a young age which followed him into his adult years. (U.S. Marine Corps photo by Lance Cpl. Jennessa Davey)