Imagine this: A terrorist attack in Times Square leads to the president declaring martial law. A massive round up of immigrants begins. The idea is to deport millions back to their home countries. Private prisons take them in until that can be done. The results are disastrous. Robert Schenkkan imagined just such a scenario in his new play “Building the Wall,” which Borderlands Theater opens in previews Sept. 27. To read more, click here.