A human skull is analyzed by forensic anthropologists during the exhumation of a mass grave at a cemetery in Escuintla, Guatemala, Tuesday Aug. 23, 2011. From the remains of unidentified bodies buried in mass graves in Escuintla's largest cemetery, forensic anthropologists expect to create a database that will eventually help match the bodies to genetic samples from the relatives of the more than 40,000 people who disappeared during the civil war. (AP Photo/Rodrigo Abd)