(RTTNews) - A prominent newspaper in Mexico's border city of Ciudad Juarez has published an editorial requesting guidelines on media publishing from drug cartels operating in the city after one of its employees was shot dead by suspected drug operatives last week. The unprecedented editorial carried by the El Diario de Juarez newspaper on its front page on Sunday was prompted by the killing of Luis Carlos Santiago, 21-year-old photographer working for the paper, last week. Santiago and a co-worker was shot by unidentified gunmen in Ciudad Juarez on 17 September when they were sitting inside a parked car outside a...