Habitat for Humanity International has announced a $100 million commitment by J. Ronald Terwilliger. The group estimates that this single legacy gift will help 60,000 families with access to improved housing conditions. "There are more than 1.6 billion people around the world who live in poverty housing and they need our help," said Terwilliger, who was CEO of Trammell Crow Residential - the nation's largest multi-family housing developer - before retiring in 2008.