On July 7, 2009, Air France Flight 447, en route from Rio de Janeiro to Paris, crashed into the Atlantic Ocean, killing all 228 people on board. The plane encountered a severe thunderstorm, and a combination of pilot error and technical malfunctions caused the loss of control. Investigations revealed that the planes speed sensors had frozen, causing confusion in the cockpit. The tragedy resulted in significant changes to airline safety and pilot training standards. The crash remains one of the deadliest in modern aviation history.