The infamous flight took off from Barcelona on March 24, 2015, and never arrived at its intended destination. Instead, the plane was involved in a devastating crash in the French Alps that killed everyone on board. Germanwings Flight 9525 was one of the worst tragedies in the history of air travel, but the horror only truly set in when the cause of the crash came to light. What first appeared to be a terrible accident was revealed to be a senseless crime of epic proportions.
Click through the following gallery to learn all about what happened on that fateful day.