MIAMI - Donald Trump and his Republican rivals turn their presidential debate into a civil and detailed discussion of Social Security, trade and immigration that leaves Trump to shake his head and declare: "So far, I can't believe how civil it's been up here." 

WASHINGTON - President Barack Obama and Canadian Prime Minister Justin Trudeau commit to curbing methane emissions by reducing methane emissions from the oil and gas sectors by at least 40 percent over the next decade from 2012 levels. 

SAO PAULO - State prosecutors say they filed money laundering and criminal misrepresentation charges against former President Luiz Inacio Lula da Silva because of evidence he and his family unduly benefited from a real estate scheme that hurt thousands.  

WASHINGTON - The Senate kills a measure to block the sale of F-16 fighter jets to Pakistan as opponents of the $700 million deal insisted no U.S. tax dollars should be used to subsidize the transaction unless Islamabad becomes a more trusted ally. 

LIMA, Peru - The Organization of American States expresses concern over the timing of the disqualification of candidates from Peru's presidential race, in which the daughter of jailed strongman Alberto Fujimori is the front-runner. 

WASHINGTON - An autopsy has found that blunt force trauma to the head was the cause of death for one of Russian President Vladimir Putin's former aides whose body was found in a Washington hotel room. 

HAVANA - While Barack Obama plans to at least privately meet with dissidents in Cuba, his visit will showcase a 180-degree turn in U.S. policy: He's wagering detente will do more to foment democracy than a half-century of support for critics of its single-party government. 

UNITED NATIONS - The United States calls for a vote on what would be the first-ever U.N. Security Council resolution to confront the escalating problem of sexual abuse by U.N. peacekeepers, a measure that U.S. Ambassador Samantha Power says is critical to help end sex crimes, especially against children.