At the time, it must have seemed like the ultimate work-study program. Ashley Baldwin, a 15-year-old sophomore at University City High School who was thinking of becoming a doctor, got a job at one of the busiest clinics in West Philadelphia. She was paid, and in no time went from answering phones to doing ultrasounds, administering intravenous medicine, and, ultimately, assisting in abortions performed by her mentor, Kermit Gosnell. Now 22 and the mother of a 2-year-old son, Baldwin on Thursday told a Philadelphia Common Pleas Court jury hearing Gosnell's murder trial of her unusual hands-on medical apprenticeship. Baldwin also...