At 2:34 on a humid, suffocating summer morning, I was walking toward my car outside Fort Belvoir, Virginia, when my phone shattered the silence of the empty parking lot.

As a Lieutenant Colonel in the United States Army, I was accustomed to sleep deprivation. I had just completed a demanding twenty-four-hour strategic planning assignment. My coffee had gone cold hours ago, the brass on my uniform felt like lead weights on my shoulders, and all I wanted was to drive home, stand under a scalding shower, and sleep until noon.