Siri has strengthened its response to potential references to suicide by offering to call the National Suicide Prevention Lifeline. Previously it would show the locations of centres but not offer to call them.
The change has been implemented in iOS 6 as well as iOS 7.
38,364 Americans committed suicide last year. Worldwide estimates range between 800,000 and a million people, with suicide the 10th most common cause of death.(Thanks, Ryan.)