Many have been granted work visas by the government, and are helping new migrants adjust to life in Mexico.
Al Jazeera's Manuel Rapalo reports from Tijuana, just across the US border.
We dialled more than 35,000 random phone numbers to paint an accurate picture of displacement across South Sudan.
Meet the man on a mission to take down Cambodia's timber tycoons and expose a rampant illegal cross-border trade.
Residents of long-neglected northwestern tribal belt say incorporation into Pakistan has left them in a vacuum.