CBS News highlights the potential use of drones to deliver blood in emergency situations. "Palo Alto, California, hopes to become the first U.S. city to use unmanned aircraft to deliver blood from a blood bank to a hospital. The Federal Aviation Administration (FAA) is reviewing the city's proposal, along with about 150 others. The agency will approve 10 projects to move forward next month. Drones delivering blood in emergencies could be the future of health care. At the Stanford Blood Center in the heart of Silicon Valley, Dr. Tho Pham's team collects about 200 pints of blood each day. Most of that supply is stored at the hospital, reports CBS News correspondent Mireya Villarreal. But sometimes, there's a need for more."
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