Jessica Kocian practices first-aid response for CPR during a Red Cross course in Chicago in May 2008. Two new studies conclude that "hands only" chest compression is enough to save a life in many cases, even without mouth-to-mouth resuscitation. (Associated Press)

Jessica Kocian practices first-aid response for CPR during a Red Cross course in Chicago in May 2008. Two new studies conclude that "hands only" chest compression is enough to save a life in many cases, even without mouth-to-mouth resuscitation. (Associated Press)