The deadly toll of human smuggling and trafficking in the US
Updated 1945 GMT (0345 HKT) July 28, 2017
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(CNN)When 10 smuggled migrants died in San Antonio from a scorching hot semi truck with almost no air to breathe, the country was appalled.
- In the 1990s, the border between Mexico and San Diego was extremely porous -- with up to 4,000 people getting arrested there each day. At the same time, there was a spike in border crossings into Arizona.
- Apprehensions then plunged after Operation Gatekeeper increased fencing along the border and added more technology such as ground sensors and cameras.
- A spike around 2003 coincided with the surge of a booming business: smuggling rings moving migrants en masse.
- A gradual decline started in the mid-2000s, after the Bush administration doubled the number of border control agents from 9,000 to 18,000.