Dennis P Culhane1, Vincent Kane, Mark Johnston. 1. Dennis P. Culhane and Vince Kane are with the National Center on Homelessness Among Veterans, US Department of Veterans Affairs, Washington, DC. Dennis P. Culhane is also with School of Social Policy and Practice, University of Pennsylvania, Philadelphia, PA. Mark Johnston is with the Office of Community Planning and Development, US Department of Housing and Urban Development, Washington, DC.