Russia’s Foreign Minister Sergei Lavrov speaks during talks with the Secretary-General of the Council of Europe, Thorbjorn Jagland, on Thursday. Zuma Press KIEV, Ukraine—Ukraine and Russia-backed rebels both said Thursday they are ready for a cease-fire in the country’s war-torn eastern provinces if a peace deal is signed at talks on Friday. At a summit of the North Atlantic Treaty Organization in Wales, Ukrainian President Petro Poroshenko said he hoped a cease-fire would be agreed to at the meeting of negotiators in the Belarusian capital of Minsk. But the most important details of the plan were still unclear—particularly the contentious issue of how much territory the Ukraine government could effectively have to cede to rebels. Russian President Vladimir Putin has presented a plan that would call for Ukraine to pull back forces and leave the rebels in control of some territory. Mr. Poroshenko hasn’t made public exactly what he […]