WASHINGTON — The newly appointed defense minister in Syria’s caretaker government, Murhaf Abu Qasra, has been holding meetings with various rebel factions in the country, aiming to bring them under the command of Syria’s defense ministry. Abu Qasra said in a statement Monday that such meetings “aim to develop a roadmap for stabilizing the military’s organizational structure.” Syria’s new authorities announced shortly after the ouster of former President Bashar al-Assad last month that unifying all rebel groups and other armed forces under a national military would be a top priority in the post-Assad era. The interim Syrian government’s defense minister