after his two terms as chancellor, and enjoyed helmut schmidt.e still makes regular public appearances. he's wheelchair-bound. his mind is as vigorous as ever. he remains one of the great political authorities of the day. >> here in berlin, it is beginning to feel like a lot like xmas. and around the world, many christian workers are getting ready to celebrate the holiday. they're traveling to the holy land which the bible says was the birthplace of cries. they will be lined up to see christianity's oldest and holiest of churches which is currently undergoing restoration. >> this is the new workplace. the roof of the church of nativity in bethlehem. they are testing be beings that have supported the church for centries. the elements have taken a heavy toll. >> we are trying to replace only the parts which will not withstand the load anymore. we want to leave the structure as close as we can to the way it was before. we use wood that we found in italy, the same age as they would here and with the same characteristics. >> the family has been involv