This is a Public Service Announcement (PSA) to raise awareness about an innovative new location-aware mobile application (iPhone and Android) from the PulsePoint Foundation. The app empowers everyday citizens to provide life-saving assistance to victims of Sudden Cardiac Arrest (SCA). Application users who have indicated they are trained in cardiopulmonary resuscitation (CPR) can now be notified if someone nearby is having a cardiac emergency and may require CPR. If the cardiac emergency is in a public place, the application, using sophisticated location-based services, will alert citizens in the vicinity of the need for CPR. The application also directs these citizen rescuers to the exact location of the closest public access Automated External Defibrillator (AED).