The Key Questions Remain Unanswered

First, we described an illustrative notional planning magnitude for each threat based on a stylized threat and risk assessment, while noting that a more comprehensive threat and risk assessments could reveal that these illustrative magnitudes were either too high or too low. Our illustrative threat assessments relied on historical data revealing observed frequencies and consequences of each threat type, trend analyses of threat data, and intelligence assessments presented in congressional testimony and other open sources.