Créditos das fotos

John Englart (Takver) on VisualHunt / CC BY-SA
United Nations Photo on Visualhunt.com / CC BY-NC-ND
Tali C. on Visual hunt / CC BY-NC-SA
dan.boss on Visualhunt / CC BY-NC-SA
United Nations Photo on VisualHunt / CC BY-NC-ND

jonathan mcintosh on Visual Hunt / CC BY
University of Essex on Visual Hunt / CC BY
Steve Rhodes on Visualhunt / CC BY-NC-ND


ResoluteSupportMedia on VisualHunt.com / CC BY
Photo on Visual hunt
Photo credit: Instant Vantage on Visual hunt / CC BY-SA


Photo credit: DVIDSHUB on VisualHunt.com / CC BY