flooded america s oldest navy base, locking down the offices, closing down the street, and searching room by room for a possible shooter who turned out not to exist. i want to bring in cnn s joe johns live at the scene and joining us from charleston, south carolina, cnn law enforcement analyst and former nypd detective harry hough. this all looked very terrifying at first glance, but then in the end it looked very satisfying to see such a massive response. is this the new normal? reporter: it s the new normal at least around july 4th when there are concerns across the country about international terrorism, ashleigh. this started around 7:29 eastern time when a woman here at the naval yard installation made a call to authorities to report that she thought she heard shots fired.