A resident looks at a parade marking the 496th anniversary of Panama City, Panama August 15, 2015. Modern-day Panama City includes the historical ruins of the original Panama Viejo settlement founded on August 15, 1519 by Spaniard Pedro Arias Davila, according to local media. (Photo by Carlos Jasso/Reuters)

Men dressed as Spanish colonists are seen at the Panama Viejo, or Old Panama ruins, marking the 496th anniversary of Panama City August 15, 2015. (Photo by Carlos Jasso/Reuters)

Students wait to play their musical instruments as they take part in a parade marking the 496th anniversary of Panama City August 15, 2015. (Photo by Carlos Jasso/Reuters)

A visitor is seen at the Panama Viejo, or Old Panama ruins, during the 496th anniversary of Panama City August 15, 2015. (Photo by Carlos Jasso/Reuters)

A security guard patrols around Panama Viejo, or Old Panama ruins, during the 496th anniversary of Panama City August 15, 2015. (Photo by Carlos Jasso/Reuters)

Students rest during a parade marking the 496th anniversary of Panama City August 15, 2015. (Photo by Carlos Jasso/Reuters)

Men dressed as Spanish colonists look on at the Panama Viejo, or Old Panama ruins, marking the 496th anniversary of Panama City August 15, 2015. (Photo by Carlos Jasso/Reuters)

A woman fixes her gloves as she rests during a parade marking the 496th anniversary of Panama City August 15, 2015. (Photo by Carlos Jasso/Reuters)

Students march during a parade marking the 496th anniversary of Panama City August 15, 2015. (Photo by Carlos Jasso/Reuters)

Students rest during a parade marking the 496th anniversary of Panama City August 15, 2015. (Photo by Carlos Jasso/Reuters)

Visitors look at a boat navigating through the Miraflores locks of the Panama Canal, during the 101st anniversary of the waterway's opening in Panama City August 15, 2015. The Panama Canal was inaugurated on August 15, 1914. (Photo by Carlos Jasso/Reuters)

A visitor stands in the rain as a cargo ship navigates through the Miraflores locks of the Panama Canal, during the 101st anniversary of the waterway's opening, in Panama City August 15, 2015. (Photo by Carlos Jasso/Reuters)