On a recent morning at a hospital in the heart of gang territory in Haiti’s capital, a woman began convulsing before her body went limp as a doctor and two nurses raced to save her. They stuck electrodes to her chest and flipped on an oxygen machine while keeping their eyes on a computer screen that reflected a dangerously low oxygen level of 84%. It’s a familiar scene repeated daily at hospitals and clinics across Port-au-Prince, where life-saving