It was slow enough — and cold enough — for Aimee Parlatore to make a cup of hot tea in a large green cup. The 27-year-old firefighter and paramedic with the Schenectady Fire Department stood in the kitchen of the department’s headquarters on Veeder Avenue on a Friday night, a little past 10:30. Lt. Chris Keough was in the room. So were a couple of other firefighters. Nobody was paying any attention to the Oklahoma City Thunder or Dallas Mavericks, who were playing basketball on the flat-screen television bolted to the back wall. Everyone seemed to be waiting for something to happen.