This week, the topic of discussion is TSA PreCheck, that magical system that allows pretty much anyone with $85 and no criminal record to bypass most of the security procedures that “normal people” have to go through at the airport. How can something simultaneously be so great and so terrible?MUSIC: “The Knife” - Maggie RogersADDITIONAL MATERIAL: The best $80 I ever spent: TSA PreCheck (Vox); TSA Agents Say They’re Not Discriminating Against Black Women, But Their Body Scanners Might Be (ProPublica)