Supporters of the Zapatista National Liberation Army (EZLN) stand during a protest in support of the 43 disappeared Mexican rural college students, at a main road near San Cristobal de las Casas, Mexico, Wednesday Oct. 22, 2014. Even after authorities have arrested 50 people allegedly involved that include police officers and alleged members of the Guerreros Unidos cartel, the Mexican government says it still does not know what happened last month to the young people after they were last seen taken by local police in Iguala, a town in southern Mexico, then later allegedly handed over to drug cartel gunmen. (AP Photo/Moyses Zuniga Santiago)