Obama at the Summit of the Americas

President Obama, with Marisol Argueta, the foreign minister of El Salvador; and Antonio Saca, the president of El Salvador, are among participants at the Summit of the Americas, with 34 Western Hemisphere nations represented. The summit got into full swing on Saturday with sessions on energy, the environment and public security. (Mauricio Duenas / AFP/Getty Images)

Sept. 16, 2014 5:49 AM PT

Obama, left, walks with Canadian Prime Minister Stephen Harper to the official photo at the Summit of the Americas, held in Port-of-Spain, Trinidad and Tobago. (Evan Vucci / Associated Press)

Argentine President Cristina Fernandez de Kirchner, left, and Brazil’s president, Luiz Inacio Lula de Silva (Evan Vucci / Associated Press)

President of Honduras Manuel Zelaya Rosales greets President Obama during the opening ceremony, at Port-of-Spain’s Hyatt Regency. (Matthew Cavanaugh / EPA)

Obama grins during a lighter moment at a working session of the summit, which has been dominated by talk of the fate of Cuba. An unexpected overture from the nations president, Raul Castro, spurred the topic to the forefront of the summit. In a suggestion that Cuba might be ready to rethink a relationship with the U.S. rooted in the Cold War, Castro said recently, We could be wrong; we admit it. (Brennan Linsley / Associated Press)