<p>Hackers released a trove of documents from the Mexican Defense Ministry. Among other revelations: the government was engaged in surveillance of students at a teachers' college in the state of Guerrero, long before 43 students disappeared in 2014. </p>
<p>Hackers released a trove of documents from the Mexican Defense Ministry. Among other revelations: the government was engaged in surveillance of students at a teachers' college in the state of Guerrero, long before 43 students disappeared in 2014. </p>