More than 18 months after 43 aspiring young teachers were abducted, Mexicans have no answers as to their fate. For many, the case is a litmus test for the country's commitment to justice.
The Mexican government had touted the effectiveness of its security initiatives. But homicides have climbed since January, with a particularly sharp spike in Mexico City.
Egypt said the group was traveling without formal authorization in the western desert near Libya, where security forces are battling Islamic militant groups.