we get two views, retired colonel derek harvey was an intelligence officer and special adviser to themander of u.s. forces in iraq, general david petraeus. he's now director for the global initiative on civil society and conflict at university of south florida. and janine davidson was an air force pilot during the 1990s and was deputy assistant secretary of defense for plans during the first term of the obama administration. she's now a senior fellow at the council on foreign relations. colonel harvey, the president doubled down today on this effort to keep us out of a ground war. was he right? >> well, i think we have the pay attention to what he said, and he has clear red lines. clearly he does not want combat troops on the ground. but it doesn't mean we're not going to have other capabilities on the ground that will be providing that support to the iraqi security forces and to others eventually. >> ifill: janine davidson, what do you think? was he right to draw that line so brightly? >> well, i think policy is different than a plan, so i do think that he is right to say that we don

army colonel, derek harvey, douglas olivett, the former national security council irrakt director for both presidents bush and obama, and our cnn military analyst, retired army lieutenant, general mark hurt ling. the pentagon called this a sustainable campaign. what exactly does that mean? how long could this last? >> wolf, as we saw this begin last night r, i think you will e action by the coalition forces, particularly the next few days, continued strike. this wasn't a one-night affair. they say sustainable, they mean that the bombing is going to continue. there will be other actions, follow-they could strike targets. and we should prepare for it to continue on a very long time. >> well, douglas olivett, you know, a lot of concern out there that the u.s. could be dragged into some sort of quagmire in syria and once again in iraq. what do you think? >> the odds aren't high, we are maintaining our red line and the iraqis' red line, no american boots on the ground that said, we have a good plan, we have here a plan that could work, you but there's no such thing as a military plan that

for answers, we turn to retired colonel derek harvey.was an intelligence officer and special adviser to general david petraeus and is now director of the global initiative on civil society and conflict at the university of south florida and steven simon, he was senior director for middle eastern and north african affairs on the national security council staff from 2011 to 2012. he's now a senior fellow at the middle east institute. thank you both for joining us. colonel harvey, how well is this coalition we talk about coming together? >> it's too early to tell at the moment. but there are major concerns. i applaud the efforts to hold the conference in paris and the right things are being said. given that, moving beyond that, the coalition is going to be required to do heavy lifting and the test will be in the substantive and meaningful actions by coalition members. contributing in the ke kinetic realm and verbally with information campaigns and some legal mechanisms to diminish recruitment, and that means an arab country or countries nee

we thank all three of you for joining us, colonel derek harvey, andrew tabler and joshua landis. >> thank you, judy. >> thank you. >> thank you. >> woodruff: the president made a call for more ambitious action on climate change today, one that he said must be led in part by china as well. chinese officials said they recognized their responsibility. but there's still a divide between the u.s., china and many developing countries over how to proceed. jeffrey brown has the story. >> there's one issue that will define the contours of this century more dramatically than any other. that is the urgent and growing threat of a changing climate. >> brown: hours after ordering air strikes in syria, president obama was in new york, to address a very different threat: climate change. he headlined a summit with more than 120 world leaders, and he pledged to work with other nations, but said the u.s. won't work alone. >> we recognize our role in creating this problem. we embrace our responsibility to combat it. we will do our part and we will help developing nations do theirs. but we can only succeed in

. >> derek harvey: we should be very careful about underestimating him.y is the real deal. >> pelley: derek harvey was in iraq for the beginnings of al- baghdadi. a colonel in u.s. army intelligence, he briefed president bush and top commanders. back then, baghdadi was a member of al qaeda in iraq and was imprisoned for a time by u.s. forces. when iraq's al qaeda leader was killed, baghdadi took over. >> harvey: when he became a key figure within the organization, he was targeted. and then in 2010 he had a $10 million bounty put on his head and he became a top-tier target. >> pelley: but the target slipped away into syria where he used the chaos of the civil war to build his army. he began to refuse orders from al qaeda and in february, al qaeda's leader kicked him out. what does al baghdadi want? >> harvey: he wants power, influence, and authority and a return to the prestige of the islamic community, and he's going to start with syria and iraq. and his strategic vision is to expand into the gulf, jordan, from the mediterranean to pakistan. >> pelley: ba