The three informational caravans for the 43 missing students of Ayozinapa will arrive in Mexico City today and participate in three simultaneous marches and then a mass rally in the central square of the Mexican capital, the Zocalo. The caravans are scheduled to depart from the states of Tlaxcala, Michoacan and Guerrero. In addition, activists could block access to the Mexico City International Airport. These demonstations are part of the Global Action Day for Ayotzinapa, to demand that the 43 missing Ayotzinapa students be returned alive. teleSUR