NASA's Mars Climate Orbiter, launched from Cape Canaveral, Florida, was lost on September 23, 1999, during its attempt to enter Mars' atmosphere. The $125 million mission aimed to study the planet's weather and climate but ended in disaster when the orbiter entered at an altitude of only 57 kilometers, far below the intended 140-150 kilometers. Investigations revealed that the loss resulted from a critical measurement error: one team used imperial units while NASA's navigation group relied on metric units. This discrepancy led to navigation inaccuracies, ultimately causing the spacecraft to disintegrate upon entry into the atmosphere. The incident shocked NASA and the public, becoming a notable example of engineering failure. Following the loss, NASA adopted more stringent engineering oversight and verification processes to prevent similar issues in future missions, emphasizing the necessity for standardized measurements and effective communication among teams.