Kevin here: Cheryl has just called me from SFO, where for reasons obscure, she has been denied entry to the USA despite doing everything by the book insofar as she knows.
(I’ll leave it to her to explain the messy details when she can and to the extent she’s willing or able to do so. I would rather not speculate and would encourage others not to do so, either.)
She apologizes to anyone who was expecting her at ICFA and elsewhere. To be honest, at this time, we don’t know if or when she’ll be in the USA again because it is notoriously difficult to correct situations like this.
Update: 20:00 PST: During the brief period where she was allowed to communicate again on the airplane before it left, Cheryl did Twitter that they’d put her on a plane and sent her back to the UK, so at least they didn’t keep her detained overnight.