An Arizona police sergeant has been credited with helping save the lives of two children in two separate incidents, days apart. Both of these nail-biting interactions were recorded by her body camera and have since tugged at netizens’ heartstrings. Phoenix Police Department’s Sgt. Courtney Fink, herself a mother, was responding to an unrelated call on Nov. 6 when she passed a frantic family that was huddled around a baby outside their apartment complex in the southern part of Pheonix. As Fink approached, family members told her the then-3-day-old baby had stopped breathing while being fed, according to an interview with the sergeant that was shared in a now-viral Facebook post by Phoenix PD in January. While Fink doesn’t have formal medical training, her mothering instincts kicked in. She rolled the baby back and forth, rubbing his sternum, and heaving a sigh of relief when he finally sneezed. “Then I knew our airway …