Hundreds of activists and relatives of victims gather in Mexico City's main square and in Guadalajara to express their grief and demand justice for the missing persons, following the recent discovery of human remains on a farm operated by a criminal group in Jalisco state. A grisly discovery of charred bones, shoes and clothing at 'Izaguirre Ranch' a suspected drug cartel training ground has prompted demands for answers and justice from relatives of the more than 100,000 people missing in Mexico. IMAGES AND SOUNDBITES