Source: Mariano Castillo / CNN It was a chilling message: Two bodies with signs of torture found hanging from a pedestrian bridge in the border town of Nuevo Laredo, Mexico. Two posters left near the bodies declared that the pair — a young man and woman — were killed for denouncing drug cartel activity on a social network. Bloggers who specialize in sharing news about trafficking have been threatened in the past, but this could be the first time that [...]