Joe Hernandez reports former Port Authority official David Wildstein testified today he told Chris Christie’s former campaign manager about lane closures on the George Washington Bridge before they happened. Avi Wolfman-Arent reports Philadelphia is doing better at substitute teacher staffing, but there’s still a ways to go. Dave Heller talks with author and Rutgers Professor Lisa Zeidner and filmmaker Toni Kalem about Zeidner’s book “Layover,” which Kalem is making into a movie. Marie Cusick reports some Bradford County residents say they’re not getting natural gas royalties. Franklin Institute Chief Astronomer Derrick Pitts joins us with a look at the skies. And Peter Crimmins reports the Free Library of Philadelphia is now loaning out musical instruments.