Christmas Hope: Isaiah 7:14

Do Christians legitimately believe that Jesus is the fulfillment of Isaiah 7:14?  Doesn't "almah" just mean "young woman", and Isaiah was talking about his wife, and not the virgin Mary some 700 years later?  Dr. J takes a look at Isaiah in the original Hebrew, and in the Greek translation done by Jewish scribes 200 years before Christ (the Septuagint), and gives an answer.  And the hope that this passage brings still brings hope to people every Christmas season.