(141121) -- PANAMA CITY, Nov. 21, 2014 (Xinhua) -- A person holds an image of a missing student during a vigil for the disappearance of 43 students in the Mexican state of Guerrero, in Panama City, capital of Panama, on Nov. 20, 2014. As part of the commemoration of the 104th anniversary of the beginning of Mexican Revolution, various social and student organizations have called for protests, marches, and blockades in the Airport area and in different parts of Mexico and in other cities of the world, calling for the safe return of the 43 missing students of the Raul Isidro Burgos Rural Teachers' College of Ayotzinapa, Guerrero, disappeared on September 26 in Iguala, Guerrero, according to local press. (Xinhua/Mauricio Valenzuela) (vf) (lmz)