The caravan stretched for miles as migrants ambled along the Coastal Highway in southern Mexico still more than 1,000 miles from U.S. border
Author: David Agren, Special to USA TODAY
Fewer caravan migrants marching to US-Mexico border, says Mexican government
The number of migrants, says Mexico, has dropped to about 4,500 from more than 7,200. Nearly 1,700 migrants remained in Mexico to seek asylum.