now back to bill hemmer. so far, we've seen that even as the pope's visit stirs up excitement, polls suggest christianity in america is on the decline. some catholic churches are closing. but there are also indications the future is not quite so dire. in late february, more than 100 young women from all over converged on ann arbor, home to the university of michigan, a hot bed of progressive thought. they're visiting a convent. the dominican sisters of mary mother of the eucharist, one of the youngest and fastest growing convents in the nation. this is called a vocation retreat. each one will decide if she wants to spend her life as a nun. in today's career-driven world, it may seem an unusual choice.