CARTAGENA, Colombia -- Exposing a rift with Israel, President Barack Obama insisted Sunday that the United States has not "given anything away" in new talks with Iran as he defended his continued push for a diplomatic resolution to the dispute over Tehran's nuclear ambitions.

Obama said he refused to let the talks turn into a "stalling process," but believed there was still time for diplomacy.

His assessment, delivered at the close of a Latin American summit in Colombia, came after Israeli Prime Minister Benjamin Netanyahu had said Sunday the United States and other world powers had given Tehran a "freebie" by agreeing to hold more talks next month.

Obama shot back: "The notion that somehow we've given something away or a 'freebie' would indicate Iran has gotten something. In fact, they've got some of the toughest sanctions that they're going to be facing coming up in just a few months if they don't take advantage of these talks."

Winding down his three-day trip, Obama also sought to offer hope for a fresh start with Cuba, saying the United States would welcome the communist-run island's transition to democracy.

Standing alongside Colombian President Juan Manuel Santos, Obama also proclaimed a free-trade agreement between their countries as a win all-around, even as labor leaders back home denounced it. -- AP

Suffolk County Sheriff Errol Toulon Jr. spoke with NewsdayTV's Ken Buffa about what life is like for the Gilgo Beach serial killer Rex Heuermann in jail. Credit: Anthony Florio; File Footage; Photo Credit: Newsday / James Carbone, John Paraskevas; AP / David Bookstaver, Clark County Sheriff's Office, Richard Drew, Mitchell Tapper, Don Ryan; Peconic River Sportsman’s Club / Kerry Goldberg

'He will be ... coming out of prison in a body bag' Suffolk County Sheriff Errol Toulon Jr. spoke with NewsdayTV's Ken Buffa about what life is like for the Gilgo Beach serial killer Rex Heuermann in jail.

Suffolk County Sheriff Errol Toulon Jr. spoke with NewsdayTV's Ken Buffa about what life is like for the Gilgo Beach serial killer Rex Heuermann in jail. Credit: Anthony Florio; File Footage; Photo Credit: Newsday / James Carbone, John Paraskevas; AP / David Bookstaver, Clark County Sheriff's Office, Richard Drew, Mitchell Tapper, Don Ryan; Peconic River Sportsman’s Club / Kerry Goldberg

'He will be ... coming out of prison in a body bag' Suffolk County Sheriff Errol Toulon Jr. spoke with NewsdayTV's Ken Buffa about what life is like for the Gilgo Beach serial killer Rex Heuermann in jail.

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