The Pentagon says it will divert up to $1 billion to support the Department of Homeland Security and Customs and Border Protection. The funding would also go toward installing lighting and constructing roads in those areas.
Shanahan says the Corps' focus will be on blocking "drug-smuggling corridors."
The El Paso sector has suddenly become the second-busiest corridor for illegal border crossings after Texas' Rio Grande Valley, many of them asylum-seeking families from Central America. The Yuma sector has also witnessed a jump in illegal crossings, particularly Guatemalan families in remote areas.