Four people were killed in what police are calling a random shooting on Chicago's blue line train as it was pulling into its last stop in Forest Park. A suspect is in custody. CBS Chicago's Tara Molina reports. President Biden and Vice President Kamala Harris on Monday met with their hostage negotiating team to try to come up with a new way forward to secure a cease-fire between Israel and Hamas and free those still being held in Gaza. Scott MacFarlane has the latest. Vice President Kamala Harris and President Biden appeared together at a campaign event Monday in Pennsylvania, their first joint campaign event since Mr. Biden dropped out of the race. Harris also campaigned in Detroit, where she was joined by union leaders as she looked up to shore up support among a crucial voting block on Labor Day. Ed O'Keefe reports. As millions headed home Monday at the end of Labor Day weekend, rough weather and technical problems caused flight delays nationwide. Striking hotel workers in major cities also made things tricky for some travelers. Errol Barnett has more.