Mexican volunteers search for clandestine crematorium on outskirts of Mexico City

Trailed by search dogs and police, more than a dozen volunteers on Wednesday walked carefully through fields of weeds and dry earth with their eyes fixed on the ground. On the fringes of Mexico City, the group began to search for human remains and other evidence after volunteer searchers said the site may be the location of a clandestine crematorium. (AP Video by Martín Silva)