Transcript for Security Concerns Remain as President Obama Heads to Paris
And president Obama will arrive in Paris today for an internation summit on climate change, two weeks after the Paris terrorist attacks. He'll be joined by officials from nearly 200 countries and security is extremely high. You can see evidence there. The soccer stadium yesterday, as police with machine guns patrolled the stands and Jon Karl is in Paris. The battle against iis is expected to be front and center? Reporter: Absolutely, Paula. You know president Obama has said this summit, the very fact that it's taking place just two weeks after those attacks here in Paris is a powerful rebuke to the terrorists, you have what president Hollande is saying the largest collections of world leaders in history to assemble here in Paris, so close after those attacks. Yes, climate change is at to which agenda, but overhanging over all of this is what to do about Isis. This climate change summit is a hallmark moment inobama's presidency, so, what's exact ly expected to happen? The goal here is a global agreement to limit greenhouse gases, to limit carbon emissions, to slow the growth of global warming. The president has said that this is a top agenda item for his second term. He needs global involvement in this, not just the united States. He'll also be meeting wione-on-one with leaders of China. We know that security will be extremely high for all of those world leaders.
This transcript has been automatically generated and may not be 100% accurate.