Don't focus on the literal meaning of the word 'secret' too much. Secret can be used colloquially to mean 'unseen' or less commonly 'that which is not widely kn

Don't focus on the literal meaning of the word 'secret' too much. Secret can be used colloquially to mean 'unseen' or less commonly 'that which is not widely known but not technically secret'. It's a dramatic way of saying such a thing, but that's to be expected in a newspaper headline.