City and county leaders want the Defense Department to keep coronavirus evacuees isolated at Lackland Air Force Base. San Antonio Mayor Ron Nirenberg and Bexar County Judge Nelson Wolff sent a letter to the Pentagon saying it makes more sense to keep the 200-plus evacuees on base. The pair says it would reduce the danger that the virus would spread into the city. Six evacuees have tested positive for coronavirus, but another 18 have been taken to local hospitals for testing.