US slaps highest-level ‘do not travel’ warning on five Mexican states

The State Department unveiled a revamped travel warning system Wednesday, giving five Mexican states the sternest “do not travel” advisory alongside war-torn nations like Syria, Yemen and Somalia. All five states — Tamaulipas on the U.S. border and Sinaloa, Colima, Michoacan and Guerrero on the Pacific coast — are hotspots of drug cartel activity, either…