Terry Gross

Dr. Louise Aronson says the U.S. doesn't have nearly enough geriatricians — physicians devoted to the health and care of older people: "There may be maybe six or seven thousand geriatricians," she says. "Compare that to the membership of the pediatric society, which is about 70,000."

NY Times cybersecurity correspondent Nicole Perlroth says hacking tools developed by the NSA were stolen, posted online and are now being used in cyberattacks, including one on the city of Baltimore.

In 1961, when President John F. Kennedy announced a goal of "landing a man on the moon and returning him safely to the earth" before the end of the decade, the mission seemed all but impossible.