A teacher calmly explains she has been shot in the foot. Another woman, sounding anguished, pleads for help. A custodian relays information from officers at the scene to a police operator. There is also the booming echo of gunshots. Officials in Newtown, Connecticut, on Wednesday released audio recordings of emergency 911 phone calls from the Connecticut school shooting that killed 20 children and six educators almost a year ago, revealing raw emotion in the voice of the callers.