Venezuela's President Nicolas Maduro looks up during a visit to the working-class neighbourhood El Chorrilo, which was bombed during the 1989-U.S. invasion, in Panama City April 10, 2015. The U.S. invaded Panama with the objective of installing a new government and deposing dictator General Manuel Antonio Noriega. Maduro will be attending the VII Summit of the Americas. REUTERS/Mariana Bazo