August 28, 2014 12:16 am PHA Security Changes Spark Safety Concerns Residents at local housing complexes say they fear for their safety in light of recent security changes from the Philadelphia Housing Authority. US & World Videos 0:51 Police officer shot and killed 1 of 4 dogs that attacked a 53-year-old man 1:49 ‘We have to do better': Philly teen dedicates her Instagram to humanizing victims of gun violence 1:22 Video shows man walk up to ring doorbell with an apparent gun, police say 2:27 76ers team owners bought tickets to pack the Wells Fargo Center with Sixers fans 1:28 Neumann University students help Delco law enforcement to investigate crime cases