Tonight, new details are emerging about the deadly plane collision at LaGuardia. Investigators now say a series of failures led to the catastrophe, including the absence of a critical tracking system that could have alerted the control tower. There are also growing questions about the tower itself and how it was staffed that night. And later, a potential breakthrough at the TSA—a new deal taking shape that could help ease those long airport wait times.

Source: LaGuardia collision exposes critical failures as TSA deal offers hope for shorter lines