By Erica Zabowski, on Flickr

Office of Media Relations, UCLA

By dbking (originally posted to Flickr as #13) [CC BY 2.0], via Wikimedia Commons

http://www.flickr.com/photos/livenature/ [CC BY-SA 2.0], via Wikimedia Commons

bookbuddies3.blogspot.com/2012/11/chapter-17-transforming-world.htm

http://www.telesurtv.net/english/news/US-Faces-Child-Homelessness-Epidemic-20141117-0011.html

By Dan Little, Lincoln Journal Star

http://nursebuddha.org/2012/01/20/lgbt-homeless-youth/

By Ed Yourdon (originally posted to Flickr as Homeless and cold) [CC BY-SA 2.0], via Wikimedia Commons

By Spc. Patience Okhuofu, 260 QM, 3rd CAB Public Affairs (United States Army) [Public domain], via Wikimedia Commons

By Matty1378 (Own work) [CC BY-SA 3.0], via Wikimedia Commons

Courtesy of Willie Baronet, Houston Chronicle

By David Shankbone (David Shankbone (own work)) [CC BY 2.5], via Wikimedia Commons

http://hchmd.org/medical.shtml

By Franco Folini [CC BY-SA 2.0], via Wikimedia Commons

By Paul Wellman

By Yoon S. Byun/Boston Globe

By Matthew Woitunski (Own work) [CC BY 3.0], via Wikimedia Commons

By Pattymooney (Own work) [CC BY-SA 3.0 or GFDL], via Wikimedia Commons

By Cydney Scott http://www.bu.edu/today/2013/medicine-with-a-mission/

Dorothea Lange [Public domain], via Wikimedia Commons

By Josh Swieringa (Flickr) [CC BY 2.0], via Wikimedia Commons

Hans Gutknecht, Contra Costa Times

By AP http://thinkprogress.org/economy/2014/08/28/3476882/homeless-veterans-down/

By Spc. Patience Okhuofu, 260 QM, 3rd CAB Public Affairs (United States Army) [Public domain], via Wikimedia Commons

By timetrax23, on Flickr

http://everydaylife.globalpost.com/diversity-issues-social-workers-26365.html

http://usich.gov/blog/serving-young-children-experiencing-homelessness

By Meggan Haller for The New York Times