Ukrainian President Petro Poroshenko has signed a law allowing Ukraine to impose a moratorium on repayment of its foreign debt until at least July 2016, a press release on Poroshenko's official website said Thursday. The Ukrainian parliament approved the bill, which could affect repayment of the country's $3-billion debt to Russia on May 19. Russian President Vladimir Putin said earlier the bill de facto was an announcement of a default, casting a negative light on the professionalism of Ukraine's leadership. Moreover, Russian Finance Minister Anton Siluanov said that Moscow would turn to an international court if the Ukrainian president signed...