(NEWSER– If there's one question you don't want to hear over the loudspeaker in the middle of a flight, it would probably be "Does anyone on board have any medical experience?" That heart-stopping question became a reality on a United Airlines flight last month when the pilot had a heart attack. As the co-pilot made an emergency landing, two nurses, Amy Sorenson and Linda Alweiss, came to the captain's rescue with a defibrillator and an IV from a medical bag on board—and he survived. Newsy reports: