Mark "Choppa" Manley is a gun owner, a gun collector and a Second Amendment advocate who has more than 70 legally owned firearms stored in a gun safe at his Baltimore home.All of his firearms comply with both federal law and the laws of Maryland. He is always very careful about that.Manley works as an intervention specialist for his local school district. His day begins early and ends late, usually around 7 p.m., because he also coaches girls' flag football.Manley and his wife, who did not want her first name used in this story, get up early for their jobs....