Relatives of missing Mexican students keep faith they're alive Protests continue in Chilpancingo with relatives and schoolmates of the 43 missing students still believing they are alive as the government confirms to the discovery of 21 corpses in mass graves in the outskirts of Iguala, where the students disappeared after clashes with police. IMAGES AND SOUNDBITES + REFILE to correct detail in SB 1, Maria Castrejon Vazquez is the aunt of a missing student +