Most Federal spending may be categorized as direct or indirect. Direct paying refers to funds the federal federal government spends on finances merchandise such as federal applications, employee salaries, and debt interest. Indirect investing refers to federal transfers to state and local governments. The FAA administers the Aviation Insurance policy https://blog.stcloudstate.edu/hied/2020/02/25/congrats-dr-williams-2020-first-place-dissertation-award-winner/comment-page-920/#comment-241261