Numbers of human cargo on the Pacific have doubled since last year . Smugglers turn to water route as authorities crack down at border crossings . As water route becomes more common , it 's also becoming more dangerous . Police say smugglers increasingly violent ; airports are closed .
Interdictions of human cargo on the Pacific have doubled since last year . Smugglers turn to water route as authorities crack down at land crossings . As water route becomes more common , it 's also become more dangerous . Authorities say smugglers increasingly violent ; boats are crammed .