Heavy metal is a cultural phenomenon that unites its fans across borders, generations, genders, religions, and social classes. Photographer Jörg Brüggemann traveled to Argentina, Austria, Brazil, Egypt, Germany, Indonesia, Malaysia, Switzerland and the USA to shoot pictures of heavy metal fans for his Gestalten-published Metalheads: The Global Brotherhood. He told us all about the globalization of heavy metal, the fine line between being a fan and keeping the distance and headbanging women in Egypt.