Pavlo Klimkin : « Klimkin : Ukrainians know bitterness of loss , share grief with families of the deceased . He says the guilty must be promptly punished .
Pavlo Klimkin : With downing of MH17 , price of peace in eastern Ukraine already too high . Klimkin : Ukrainians know bitterness of loss , share grief with families of the deceased . He says the guilty must be promptly punished .