At least 450 passengers missed flights, and a lot more lost their minds, because of long TSA lines (we’re talking more than two hours) at Chicago’s O’Hare Airport.

+ As many travelers know, the O’Hare fiasco is emblematic of a broader problem. Quartz breaks the issue down with the world’s most simple chart. (They were gonna add a line for travelers’ rage, but the Internet isn’t big enough.)