Yahoo News | US strikes on IS oil supply initially only 'minimally effective' Yahoo News Washington (AFP) - US air strikes have been only "minimally effective" in destroying oil infrastructure in the hands of jihadists, a military spokesman said Wednesday, explaining why tanker trucks in Syria are now being targeted instead. Pentagon: US Airstrikes on IS Oil Facilities 'Minimally Effective' Upsurge in air strikes threatens Isis oil production Video Shows US Launching First Airstrikes On ISIS Oil Trucks |