Another part of this is that these agencies by temperament hedge their answers and were remarkably unequivocal, noting "new evidence could change their mind" -a

Another part of this is that these agencies by temperament hedge their answers and were remarkably unequivocal, noting "new evidence could change their mind" -and they have become less unequivocal. This strongly suggests new evidence, but since this is in the secrecy-strategic space, we're not going to know. It could be somebody senior said "change tone of voice" or it could be something new was found. We can't know.