DnA goes to check out CAFAM\u2019s timely show of art and architecture, The U.S.-Mexico Border: Place, Imagination, and Possibility\xa0-- and on the way encounters the installation of LA\u2019s pilot "smart node." Will the streetlight of the future contain cameras, charging stations, speakers and sensors to detect gunshots? And we meet the homeless artist whose Los Angeles studio was a freeway on-ramp, until he was moved on.