Factors that may affect public support or opposition to U.S. military intervention in humanitarian crises around the world are examined to determine the impact of foreign policy frames on individual risk propensity. The source of the foreign policy frames, type of humanitarian crisis, location of the crisis and race/ethnicity/religion of the endangered population, tolerable ratios of U.S. lives saved/lost to foreign citizens saved/lost, and probability of casualty-free success are also investigated. (Contains 6 tables and 26 footnotes.)