Terror Threat Hangs Over Climate Change Summit in Paris

ABC's Jonathan Karl reports on how the Paris attacks will impact the climate change summit.
1:32 | 11/29/15

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Transcript for Terror Threat Hangs Over Climate Change Summit in Paris
Paris, a city on edge this morning, police there yesterday guarding the first soccer match since the attacks and now 200 world leaders, including president Obama, set to arrive for a conference on climate change just two weeks after those Isis terror attacks. Let's bring in chief white house correspondent Jonathan Karl on the ground in Paris. Good morning, Jon. Reporter: Good morning, Martha. The effort to combat climate change is what's bringing all of the world leaders here to Paris, but hanging over this entire summit is terrorism and the battle against Isis. President Obama has said the very fact that this summit is taking place, just two weeks after the attacks that rocked this city, is, quote, a powerful rebuke to the terrorists and according to president Hollande, this is the largest gathering of world leaders, ever, in Paris. Security appears to be higher here than at any time after world war ii. Terrorism will be on the agenda when president Obama and Hollande have a one-on-one meeting at dinner tomorrow night. Hollande is seeking unity and a stepped-up effort against Isis. But in the wake of the shooting down of that Russian jet by Turkey last week, unity is a very tall order. Turkish prime minister erdogan has refused to apologize and Russia has slapped severe economic sanctions on Turkey, one of the subplots here at the summit is, prime minister erdogan has asked for a meeting with Vladimir Putin. Both will be here. But so far Putin has refused to

This transcript has been automatically generated and may not be 100% accurate.

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