https://media.defense.gov/2022/Mar/28/2002964702/-1/-1/1/NDS-FACT-SHEET.PDF
https://supo.fi/documents/38197657/39761266/National+Security+Overview+2021.pdf/a772aa98-30bc-1bcc-62c0-9d77dda2733b/National+Security+Overview+2021.pdf?t=1649405324653
https://www.brookings.edu/research/a-post-american-europe-and-the-future-of-u-s-strategy/
https://www.ifri.org/sites/default/files/atoms/files/pe-3-2022_stark.pdf