ARMINFO News Agency, Armenia Monday Richard Giragosian: David Tonoyan to come back to Defense Ministry as a Head, and Vigen Sargsyan to take the post of Prime Minister Yerevan June 12 Marianna Mkrtchyan. Richard Giragosian, the Director of Regional Studies Center, is sure that David Tonoyan, the Minister of Emergency Situations and the Ex-Defense Minister, will lead the Armenian Defense Ministry in the future. Giragosian described it with the fact that Tonoyan is a professional military. "After the actual Defense Minister Vigen Sargsyan goes for a higher post, the best candidate for the post of defense minister will be David Tonoyan, who is a professional military," the expert told ArmInfo reporter. He accentuated also, that sees two scenarios of the further situation: " the first one in 2018 the Prime Minister will be Serzh Sargsyan, whose Presidency will expire by that time. The second scenario assumes that the Prime Minister will be Vigen Sargsyan. And the third, most unlikely scenario is that Karen Karapetyan will keep occupying his post. But this option is possible only if Moscow implements pressure on Yerevan," Giragosian summarized.