Video: Documenting a human rights crisis on the US-Mexico border

The remains of at least 6,000 migrants have been found in U.S. desert land since U.S.-Mexico border policies were implemented in the 1990s. Some groups estimate that for each set of remains recovered, those of 10 more people are lost to the harsh desert elements. Advocates and authorities attribute the escalating number of deaths not only to rising heat but also to ever-tightening border security forcing migrants into more remote and dangerous terrain.