mormons move once again. their new leader, brigham young, takes a large contingent to the great salt lake valley. in 1885, the mormon churchng polygamy as a way to gain statehood. church elders approach miles park romney, miles' son asking him to set up a mormon colony where polygamy could be practiced, first in the arizona territory and then in mexico. >> and they went to mexico so they could continue to practice plural marriage. and then when you had the mexican revolution in 1913, they had to come back and they had to start all over. >> although steeped in his family's history with the church, as a teenager, mitt romney is far from a devoted mormon. >> so he then went on his mission to france as he left, mission to france. as he left, you know, he has since said he had only a thin tissue, unquote, of connection to his faith of mormonism. >> but missions serve two purposes, helping convert others while also deepening the faith of the young missionaries themselves. >> important roles would be what missionary work does for the young men and young women who serve missions. that is, it's maybe one of the most effective tools