Friends of ours were supposed to fly out to the USA today. A couple in their 50's, 16 y o daughter and elderly grandma. The dad is an accountant and the mum is a nurse. Very conservative WASPy types. They had their visa waiver program approvals months ago.
Qantas rang them this morning to say that the grandmother, mother and daughter have been denied landing approval (from manifest) Qantas reckon it's only ever happened once or twice before.
The US embassy couldn't help and everything stateside was closed. So, the plane left without them and the situation is still unresolved.
I suppose it is some kind of mistaken identity, but it seems crazy. Apparently this is almost unheard of, and they have picked on an elderly lady, a middle aged nurse and a school girl!