21
by Pettyjohn, Stacie L.
Published 2012
RAND

22
by Resnick, Adam C., Welser, William, Yoho, Keenan D.
Published 2014
RAND Corporation

23

25
by Porche, Isaac R.
Published 2014
RAND/National Defense Research Instittue

28
by Asch, Beth J.
Published 2009
RAND

29
by Larson, Eric V.
Published 2009
RAND

30
by Hunter, Robert Edwards
Published 2010
RAND

31
by Ware, Willis H.
Published 2008
Rand Corp.

32
by Khalilzad, Zalmay
Published 1999
RAND

35