Sam was in a phantom and some how fell into space : ( Read the book Halo: The Fall of Reach to learn more to what happened.
he got shot
Hell no.. hes alive and getting better daily
He had two types of cancer - hairy-cell leukemia and multiple myeloma.
NO. Sam Elliot will never die, he'll just ride off into the sunset and live on in the hearts and dreams of women everywhere.