People and police officers stand in front of a building with an image of Mexico's President Enrique Pena Nieto and the words "We are not complete, we are missing 43" projected on it, during a protest in support of the 43 missing trainee teachers in Monterrey December 1, 2014. The popularity of Pena Nieto has sunk amid concerns about his handling of security problems and corruption, polls showed on Monday, in a sign that his ruling party could lose ground in elections next year. Polls noted the sharp drop in his approval rating since the apparent massacre of 43 trainee teachers students and a conflict of interest scandal involving a home being purchased by the first lady. REUTERS/Daniel Becerril (MEXICO - Tags: CRIME LAW CIVIL UNREST EDUCATION POLITICS)