Kettling (also known as containment or corralling) is a police tactic for controlling large crowds during demonstrations or protests. It involves the formation of large cordons of police officers who then move to contain a crowd within a limited area.

"PennDOT said that an oversized vehicle carrying a large cylinder hit an overhead Conrail bridge on I-95 north just before the Betsy Ross Bridge/Aramingo Avenue Interchange around 1:30 p.m. No injuries were reported, however, the damage was done."