What is the difference between 'Calibra' and 'Libra'?
This article uses them interchangably, and does not seem to distinct between the two.
Edit: Looking more closely --
"That means that even though Facebook might not know how much money is in someone’s Calibra wallet or their other transactions [...]"
It seems that Calibra is the name of the 'wallet', and Libra is the name of the 'coin' itself.