In August 1939, a young woman named Clare Hollingworth got her first journalism assignment. “You must go to Warsaw tonight,” her editor said. Days later, after Hollingworth spotted “hundreds of tanks, armored cars and field guns” near the Polish border with Czechoslovakia, the 27-year-old cub reporter kicked off her career with a once-in-a-lifetime dispatch heralding the outbreak of World War II: “1,000 TANKS MASSED ON POLISH FRONTIER. TEN DIVISIONS REPORTED READY FOR SWIFT STROKE.”