Alva Review-Courier -

The towering metal fence that divides the United States and Mexico at the edge of the Pacific Ocean has an imposing new feature: row upon row of razor wire.

The wire that's typically used in battlefields and on prison barriers is the most visible result of the $210 million military deployment along the U.S.-Mexico border, creating an imposing sight for the crowd of Central American migrants gathering in Tijuana.

Soldiers and contractors have been installing different versions of the sharp wire barriers all along the border — on the fence, at ports of entry and on the banks of the Rio Grande in...