REUTERS

"Without excessive optimism, with a pure note of reality, I am convinced that in the time left there's the ability in short order, frankly, to begin the process of the full implementation," he said at a joint press conference with Ukrainian President Petro Poroshenko in Kyiv on Thursday.

Read alsoKerry announces another $23 mln in U.S. humanitarian aid to eastern Ukraine"Now, I think that it is necessary to find a path forward that unites the interests of the parties in a way that is fair and sensible, and provides assurance to both sides – to all sides, because there's more than one, or two – that the requirements of Minsk are in fact being met and being met in a way that gives everybody an assurance that their needs are going to be satisfied," he said while commenting prospects for the completion of the implementation of the Minsk security component until the end of Barack Obama's presidency.

Kerry also pointed to Ukraine's significant progress in the implementation of the Minsk agreements, particularly, their political aspects.

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Read alsoSanctions great motivation for Russia to fulfill Minsk accords – Poroshenko"I think it's the way you get things done, is to believe in the possibilities," he told Poroshenko.