`` Escopetarras '' were invented by Colombian peace activist César López in 2003 at a gathering after the El Nogal Club bombing in Bogotá , when he noticed a soldier holding a gun like a guitar .
`` Escopetarras '' were invented in 2003 by a Colombian peace activist named César López . At a gathering after the El Nogal Club bombing in Bogotá , he noticed a soldier holding a gun like a guitar and got the idea for it .