As an avid biker for over nine years, photographer Martin Dixon gained unprecedented access to the predominantly African American motorcycle clubs in Brooklyn, the Bronx, and Manhattan. Comprising a huge subculture of urban road warriors totally unknown to most New Yorkers and bike club enthusiasts, these black "biker gangs" -- with names like the Jaguars, the Black Falcons, the Pythons, the Transit Wheelers, the Imperials, the Corpians, the Harlem...