I understand the average citizen may not, but, presumably, a US senator and the Secretary of the Department of Defense Whatever it is Now Called. It appears they do not either, which is why the level of questioning was so vapid.
Khanna was unprepared however, to parry Hegseth’s strawman and put him on the spot.
Let’s say Khanna can get a ballpark number - “this war has cost us 50 billion in direct costs and maybe another 50 in indirect costs due to lost economic activity from gas prices”. Hegseth starts throwing out this nuclear bomb shit you just ask
“If Iran had offered to sell us all their uranium, centrifuges, and other materials related to a nuclear program for $100B, would you have accepted that deal?”