Some observers say Colombian President Alvaro Uribe, shown delivering a speech at the Police School in Bogota on June 3, may not have been comfortable with his successor's attempt to improve relations with Venezuelan President Hugo Chavez. Guillermo Legaria/AFP/Getty Images hide caption

itoggle caption Guillermo Legaria/AFP/Getty Images

Mexican navy marines patrol a crime scene near Monterrey, Mexico, after unidentified gunmen killed one person while trying to assassinate the local police chief, March 21, 2010. Monterrey's economy is rebounding, but rampant drug violence is keeping investors away. AP hide caption

itoggle caption AP

Venezuelan President Hugo Chavez (shown here in Caracas on July 3) has announced plans to take over part of Empresas Polar, the country's best-known company. But there is opposition to the move. Miguel Gutierrez/AFP/Getty Images hide caption

itoggle caption Miguel Gutierrez/AFP/Getty Images

Demonstrators in Buenos Aires wave a gay pride flag Wednesday outside Argentina's Congress in support of a proposal to legalize same-sex marriage. Natacha Pisarenko/AP hide caption

itoggle caption Natacha Pisarenko/AP