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Any else surprised to see which 3 countries in the world spend $0 on defense according to this dataset?

Three $0 defense spenders: 1) Costa Rica dissolved its army in 1948 after a short but bloody internal conflict, with the decision incorporated into the country’s constitution.; 2) In 1990, Panama followed suit, dismantling its army after the American invasion to remove the country’s military dictator, Manuel Noriega.; 3) NATO membership seems to be enough for Iceland as different member states take turns guarding their air space.