NEW : Russian defense minister says Malaysia Airlines Flight 17 crash was Ukraine 's fault . Ukrainian and Russian Presidents are satisfied by ceasefire , official says . Some 70 % of the Russian troops believed to have been in Ukraine have withdrawn back across the border , Ukrainian President Petro Poroshenko said , according to the national news agency Ukrinform . ` Petro Poroshenko : ` ` This is another hope that peaceful initiatives have a good perspective '' the first time in years' Comment: The US has been bombing ISIS for months now with no end in sight.
NEW : Russian defense minister says Malaysia Airlines Flight 17 crash was Ukraine 's fault . Ukrainian and Russian Presidents are satisfied by ceasefire , official says . Petro Poroshenko : ` ` This is another hope that peaceful initiatives have a good perspective '' the first time in years' Comment: The US has been bombing ISIS for months now with no end in sight.