Cardiac arrest survival rates jumped from 10% to 47% in McKinney, Texas, after automated external defibrillators (AEDs) were placed in all police vehicles and neighborhoods across the city. The McKinney Fire Department launched the initiative two years ago, basing it on a similar program in Seattle. The goal is to ensure that an AED is “never more than four minutes away from any cardiac event,” said Good News Network. In the last year, the AEDs have helped quickly revive nine McKinney residents.