How does an airplane go missing? A look at the disappearance of Alaska flight.
Planes carry transponders that transmit their real-time location. The Alaska plane stopped sharing that data on Thursday.
How does an airplane go missing? Crews searching for Alaska plane
Planes carry transponders that transmit their real-time location. The Alaska plane stopped sharing that data on Thursday.
DC plane crash updates: Helicopter had advanced tracking system turned off, lawmaker says
The U.S. Army helicopter that collided with an passenger jet near Washington, D.C., had an advanced surveillance system ...