About 100 American citizens and legal permanent residents who wish to evacuate Afghanistan are still stuck in the country while waiting for a flight back to U.S.-held grounds, a senior State Department official announced on Monday. The official, who briefed reporters on condition of anonymity, said they are working to get people safely out of the war-torn nation, but the Taliban’s “unpredictability” on who is allowed to leave is holding back the rescue operation. “The biggest constraint to the departure of our citizens and others from Afghanistan, of course, remains the Taliban’s unpredictability regarding who is permitted to depart,” the official said, according to a State Department statement. “The second big constraint is the absence of regular commercial air service to enable folks who wish to depart to do so in a predictable manner.” The official also noted that the State Department is in “regular communication” with private groups chartering their …