Habitat for Humanity is the well-known group that organizes volunteers to build houses for the homeless. On one job site a worker was awakened at 2:00 a.m. by a noise. He went over to the almost finished house. He found one of the volunteers on his knees under the sink, laying floor tiles. The worker explained that the house was supposed to be completed the next day and he didn't want the family to be disappointed. That man, on his knees under the sink at two o'clock in the morning was the former President of the United States, Jimmy Carter!