It's day 12 and we've officially passed the deadline for concluding a UN climate change deal in Paris. With so much at stake it's little surprise that we've gone into extra time...But the big surprises could come in the final document, due to be unveiled Saturday morning. How ambitious a deal can we expect? Will it be a turning point for the planet? Our special edition of The Debate comes live from the COP21 climate conference at Le Bourget in Paris.
Produced by Charles Wente and Chris Davis