Transcript for President Obama Outlines Plans For Fighting ISIS
Now to the fight against Isis, president Obama arriving home overnight where he started building a coalition to fight the fundamentalist islamic group that's been on a brutal March through Iraq and Syria. As we all know beheaded two Americans. Here's ABC's Jeff Zeleny with the latest. Reporter: Overnight president Obama returning home for a meeting of world leaders where he delivered strong new words in the fight against Isis. We are going to degrade and ultimately defeat isil. Reporter: At a nato summit in Europe, the president and leaders of nine other nations vowed to form an international coalition to fight the islamic state in Iraq and Syria. It was the toughest talk yet from the president who once dismissed them as a JV team. Even earlier this week calling them a manageable problem. You can't contain an organization that is killing that many innocents and enslaving that many women. The goal has to be to dismantle them. Reporter: Some signs of that determination already. Isis fighters posting this photo Friday of what they said was an unarmed American surveillance drone flying over Syrian territory. But the president is still weighing how much force to bring against acts of barbarism like the beheading of American journalist Steve sotloff and James Foley. You take out their leadership and over time they were not able to conduct the same kinds of terrorist attacks as they once could. Reporter: Now, the president must now decide how to turn that tough talk into action and whether he can build the case for a broader military campaign even with international support and he warned that any fight will be a long one. Paula. Jeff Zeleny live from Washington this morning, Jeff, thank you.
This transcript has been automatically generated and may not be 100% accurate.