This is the border between US and Mexico. One can’t really call it a poverty line anymore – maybe that was the case 30 years ago. But it’s the most frequently crossed international border in the world, with about 250 million people crossing every year. It is guarded by more than twenty thousand border patrol agents.
The poverty threshold, or poverty line, is the minimum level of income deemed necessary to achieve an adequate standard of living in a given country. The common international poverty line is currently at $1.25 a day.