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https://www.cnn.com/2017/08/26/asia/afghanistan-pakistan-india-china-russia-us/index.html

https://14joshko.wordpress.com/2012/01/29/how-has-the-afghan-war-affected-afghanistan/

https://www.thebalance.com/cost-of-afghanistan-war-timeline-economic-impact-4122493

http://watson.brown.edu/costsofwar/costs/human/civilians/afghan

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http://www.answers.com/Q/Why_is_there_a_war_in_Afghanistan

http://thehill.com/policy/defense/372641-pentagon-war-in-afghanistan-will-cost-45-billion-in-2018