The engine of a UPS cargo plane that crashed on Tuesday could have detached from the jet, an expert has warned, causing a devastating fireball that killed at least nine people. There are fears the death toll could rise after Kentucky Governor Andy Beshear announced this morning that sixteen families had reported their loved ones missing. The Boeing MD-11 plane exploded shortly after departing from Kentucky's Muhammad Ali International Airport in Louisville last night. Speaking with CNN, Mary Schiavo, former Department of Transportation Inspector General, said she believed the engine had come off before the explosion. 'You can see there...