Sam Abuelsamid details the workings of GPS and navigation systems using satellites. Leo explains how United States citizens have become dependent on the GPS system created by the Air Force, and Sam outlines how the satellites use time codes to estimate where users are on the planet. Unfortunately, these signals are relatively weak and can be easily overpowered, which can lead to spoofing attempts. While extremely useful for drivers, Sam advises them to always keep an eye on the road! Nobody wants to accidentally drive into a river while solely paying attention to their GPS screen.