A journalist holds a tablet with the portrait of Danilo Lopez, correspondent for the newspaper Prensa Libre, during a protest demanding an investigation into the killing of two journalists and increased security for the profession in Guatemala City, March 11, 2015. Lopez and Federico Salazar of Radio Nuevo Mundo, were killed by gunmen on a motorcycle Tuesday while walking in a park in the southern town of Mazatenango. (AP Photo/Moises Castillo)