Hailey

Few people noticed the secret codewords used by our astronauts to describe the moon. Until now, few knew about the strange moving lights they reported. George H. Leonard, former NASA scientist, fought through the official veil of secrecy and studied thousands of NASA photographs, spoke candidly with dozens of NASA officials, and listened to hours and hours of astronauts' tapes.

Zero day: a software bug that allows a hacker to break into your devices and move around undetected. One of the most coveted tools in a spy's arsenal, a zero day has the power to silently spy on your iPhone, dismantle the safety controls at a chemical plant, alter an election and shut down the electric grid (just ask Ukraine). For decades, under cover of classification levels and non-disclosure agreements, the United States government became the world’s dominant hoarder of zero days.