https://rusi.org/explore-our-research/publications/commentary/why-did-afghan-army-evaporate
https://www.washingtonpost.com/world/europe/russian-submarines-are-prowling-around-vital-undersea-cables-its-making-nato-nervous/2017/12/22/d4c1f3da-e5d0-11e7-927a-e72eac1e73b6_story.html?utm_term=.e39e8fb9dafe
https://www.nato.int/en/what-we-do/operations-and-missions/natos-role-in-kosovo
https://www.kyivpost.com/article/opinion/op-ed/steven-pifer-ukraine-and-nato-dont-ask-do.html