This is just so beautiful, Lula, and such an amazing accomplishment. I couldn't imagine how it was done, so I looked it up. Here is the link below, for those that like to know. The second video has the most beautiful imagery. Gorgeous.

Here is a quote from the composer/conductor:

'The intimacy of all the faces, the sound of the singing, the obvious poetic symbolism about our shared humanity and our need to connect; all of it completely overwhelmed me.'

 http://ericwhitacre.com/blog/the-virtual-choir-how-we-did-it