A demonstrator leans on a wall reading "Pena murderer. Stay in China" -referring to Mexican President Enrique Pena Nieto- during clashes with riot police that erupted following a protest against the suspected massacre of 43 missing Mexican students, at the airport in Acapulco, in the Mexican state of Guerrero State, on November 10, 2014. Protesters angry at the suspected massacre threw stones and a firebomb at riot police in the Pacific resort of Acapulco on Monday, injuring 11 officers. Around 300 students, some wearing masks and armed with sticks and machetes, were joined by some parents of the 43 missing young men as they marched toward the city's airport, but police blocked their way. Mexico was confronted with one of the grisliest massacres in years of drug violence after gang suspects confessed to slaughtering 43 missing students and dumping their charcoaled remains in a river. AFP PHOTO/RONALDO SCHEMIDT        (Photo credit should read RONALDO SCHEMIDT/AFP/Getty Images)