This was the first time since the advent of cable and satellite television that a vast number of cable networks would suspend programming to air live news coverage of events. Programming on cable and satellite channels was also altered in the immediate aftermath, as only appropriate re-runs were aired and commercials were either changed, suspended, or replaced by PSA messaging to help the attack's victims. Millions of television viewers, watching live broadcasts of the attacks unfolding, would see the second plane hit the South Tower and both towers collapse.