So, I noticed that Southwest Airlines is starting to offer TSA PreCheck at Phoenix Sky Harbor Airport. I Googled TSA PreCheck and everything that I could find pointed me to the Global Online Enrollment System (GOES). I noticed that the site makes no mention of TSA PreCheck so I checked Google again. Still, only find references to GOES. Remembering this is a government run website, I thought maybe if I started the Global Entry process it would mention the PreCheck. I went all the way through the Global Entry process and never found anything referring to PreCheck. Can anybody point me in the right direction to signup for TSA PreCheck?