Aaron Moselle reports on opening statements in Philadelphia District Attorney Seth Williams’ corruption trial. Avi Wolfman-Arent reports Philadelphia public school teachers have their first contract in four years. Peter Crimmins reports the head of the Philadelphia Orchestra has announced she will step down at the end of the year, when her contract expires. Attorney Peter Murphy explains the ins and outs of setting up a marijuana business. Catalina Jaramillo reports the Philadelphia neighborhood of Eastwick has been feeling the effects of climate change for 20 years. And Dave Heller talks with new US Poet Laureate and Princeton Professor Tracy K. Smith.