WNYC’s Matt Katz sits down with Dave Heller’s to help explain the recent developments in “Bridgegate” and their implications for Chris Christie. Marielle Segarra maps out Pennsylvania’s structurally deficient bridges. Holly Otterbein profiles Minister Rodney Muhammad, the new president of the Philadelphia chapter of the NAACP. Chief Astronomer at the Franklin Institute Derrick Pitt prepares us for the upcoming meteor shower. Chris Satullo explains why the courage to compromise is more impressive than sticking to your guns.