Alva Review-Courier -

SAN DIEGO (AP) — As thousands of migrants in a caravan of Central American asylum-seekers converge on the doorstep of the United States, what they won't find are armed American soldiers standing guard.

Instead they will see cranes installing towering panels of metal bars and troops wrapping concertina wire around barriers while military helicopters fly overhead, carrying border patrol agents to and from locations along the U.S.-Mexico border.

That's because U.S. military troops are prohibited from carrying out law enforcement duties.

What's more, the bulk of the troops are in Texas — hundreds...