President Obama and Japanese Prime Minister Shinzo Abe approach the podiums for a joint press conference Tuesday at the Rose Garden of the White House in Washington. President Obama is hoping to finalize a new trade agreement with Japan and other Asian nations soon. Alex Wong/Getty Images hide caption

itoggle caption Alex Wong/Getty Images

"Part of the reason we're here is because climate change is threatening this treasure and the communities that depend on it," Obama said Wednesday of his visit to Everglades National Park in Florida. "If we don't act, there may not be an Everglades as we know it." Mandel Ngan/AFP/Getty Images hide caption

itoggle caption Mandel Ngan/AFP/Getty Images

President Obama, seen shaking hands with Raul Castro at the Summit of the Americas in Panama, engaged in the first substantive face-to-face U.S.-Cuba talks in more than 50 years. Scott Horsley/NPR hide caption

itoggle caption Scott Horsley/NPR

President Barack Obama smiles as he looks over towards Cuban President Raul Castro during their meeting at the Summit of the Americas in Panama City, Panama on Saturday. Pablo Martinez Monsivais/AP hide caption

itoggle caption Pablo Martinez Monsivais/AP

President Obama talks with Cuban counterpart Raul Castro before Friday's inauguration of the VII Summit of the Americas in Panama City. Reuters /Landov hide caption

itoggle caption Reuters /Landov

Night in Port-au-Prince, Haiti. Analysts warn a sudden energy shortage in the Caribbean could create security problems not far from U.S. shores and even trigger mass migration. But thanks to its domestic energy boom, the U.S. has a rare opportunity to get out in front of the crisis and possibly build some goodwill of its own. Hector Retamal/AFP/Getty Images hide caption

itoggle caption Hector Retamal/AFP/Getty Images

"We must try as best we can to balance isolation and engagement, pressure and incentives, so that human rights and dignity are advanced over time," Obama said five years ago, accepting the Nobel Peace Prize. Mark Wilson/Getty Images hide caption

itoggle caption Mark Wilson/Getty Images