QUOTE
"… millions of Americans who travel internationally have been assigned risk assessments over the last four years without their knowledge.

"… … …

" Almost every person entering and leaving the United States by air, sea or land is assessed based on ATS' analysis of their travel records and other data, including items such as where they are from, how they paid for tickets, their motor vehicle records, past one-way travel, seating preference and what kind of meal they ordered."
UNQUOTE

Ha! Now we know why Molly Meldrum was refused entry!