'Jeopardy' host Alex Trebek announces he has advanced pancreatic cancer, vows to 'fight this' and 'keep working'

'Jeopardy' host Alex Trebek announces he has advanced pancreatic cancer, vows to 'fight this' and 'keep working'

LOS ANGELES -- 'Jeopardy' host Alex Trebek announces he has advanced pancreatic cancer, vows to 'fight this' and 'keep working'