Volunteer build activities [for World Habitat Day: 27th Annual Carter Work Project, with former President Jimmy Carter and former First Lady Rosalynn Carter joined in Washington, D.C. by Secretary Shaun Donovan, Habitat for Humanity International Chief Executive Officer Jonathan Reckford, Habitat for Humanity of Washington, D.C. President Kent Adcock, and more than 200 volunteers, including HUD staff members, working on renovating and building homes in D.C.'s Ivy City neighborhood]