MTA Chair Janno Lieber says the city needs to keep getting guns off the street after Thursday’s subway shooting, where a man was shot in the head with his own weapon. Meanwhile, tens of thousands of New Yorkers insured through Aetna could soon lose access to New York Presbyterian’s vast network of hospitals and doctors. Plus, residents of a Lower East Side community say they’re fed up with years of delays on an MTA project on the M line. Finally, Willets Point, Queens, is poised for a transformation, including a new soccer stadium, a school, and thousands of affordable housing units. WNYC’s Arun Venugopal has the latest on the project.