a couple got inspired by humanae vitae. they saw a need to teach couples about the method and formalize it. make it easier to understand so they can learn. it was in 1971, three years after humanae vitae , when the couple was starting to science and the pope brought his letter saying this is what catholics should do. i think researchers were catholic or people that were like-minded and thought we needed to make this effective, safe, and stable. that has happened. what you teach is genuine science and biology. >> i think with our background in technology and science, i, didn't believe in it to be honest. i didn't think it was going to work. every time i heard someone use natural family planning they had a ton of kids. at that time i did not understand. i think as we started learning about it i was fascinated by how our bodies work and how effective it is. >>it seems to me -- you are in a systematic program and volunteer as teachers. where at? >> we have been helping different dioceses mainly in san francisco and oakland. we

humanae vitae says it has burned 150 acres and it's only 10% contained.n evacuation center has been set up on first street in the city of napa. >> two more buyers raising -- fires raging. the river prior -- fire having to evacuate people. dozens of homes are also evacuated right now. the fires have burned 14,000 acres and they are 5% contained. >> as for thefi the numbers are staggering. a mechanical failure of a vehicle started this fire. many homes have been destroyed and 5000 are threatened. 84,000 acres has burned and the fire is just 5% contained. thousands of people remained evacuated. -- remained evacuated. >> two people that died were men helping fight the fire. one was fire inspector jeremy stoke. there is no word on exactly how he died. in a statement his colleagues as we ask for your thoughts and prayers for his family and fire department as we process this tragic loss. the other man that died was a bulldozer operator working under private contract. his name was don smith, of pines. he was killed as he went to clear vegetation. >>> flags have b