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A new cancer-fighting vaccine holds life-saving promise for young women, but debate over its use is raising tough questions at the crossroads of medicine and morality. NOW investigates the controversy over Gardasil, a new vaccine developed by the pharmaceutical giant Merck that blocks certain high-risk strains of the sexually-transmitted human papillomavirus (HPV) which cause 70% of cervical cancers. Just weeks ago, Texas Governor Rick Perry issued a controversial executive order requiring all girls entering sixth grade to be vaccinated with Gardasil, with opt-out exceptions. Some 20 other states are considering similar action. But many critics feel that mandating these vaccinations infringes on parental rights and may encourage risky sexual behavior among young people. Others argue that the rush to inoculation is too hasty, and that more medical review is required. Some also wonder if state government decisions were inappropriately prejudiced by Merck's powerful political influence. N