The overnight shooting, which took place on the street outside a terminal at Chicago O'Hare Airport, closed the passenger pickup area for hours.

An officer fires a weapon at a sample of the material used in bullet-resistant enclosures to be installed on buses, at a range in Bedminster, Pa., Tuesday, Feb. 25, 2025. (AP Photo/Matt Rourke) ...

SEPTA said it initially will run eight buses with the compartments to see what, if any, adjustments are needed and to get driver feedback.