Turkish airstrikes and a possible ground invasion in northern Syria are impacting joint US-Kurdish operations against the Islamic State, according to joint military command. Mazloum Abdi, the commander of the Kurdish-led Syrian Democratic Forces in northeast Syria, told reporters that the group’s joint counter-IS operations alongside the U.S.-led international coalition have been “temporarily paused” because of the recent Turkish airstrikes, and that gains made in the fight against the extremist group to date may be “threatened.” Also on Tuesday, Pentagon spokesman Air Force Gen. Patrick Ryder…