$Apple (AAPL.US)$ Apple sees its car-building plans hit agai...

$Apple (AAPL.US)$ Apple sees its car-building plans hit again by executive departures. Apple's self-driving car project recently lost three key technicians in recent weeks. The spate of executive departures shows the challenges Apple faces in the driverless space. While self-driving cars have great potential, and Apple sees them as key to the company's future, perfecting the technology has baffled Apple engineers for years.