Below is the rush transcript of "This Week" on August 24th, 2014. It may contain errors.
ANNOUNCER: Today on This Week, imminent ISIS threat -- American families fearing for kidnapped loved ones, urgent warnings to police about a threat to the homeland and the U.S. considering a massive military escalation, including airstrikes in Syria. This morning, breaking details and full analysis of the ferocious fight against the deadly terror group.
On edge, after weeks of clashes, a community starts to rebuild. Pierre Thomas on how we prevent another Ferguson.
Plus, a celebration four decades in the making. Why the White House won't be the same.
UNIDENTIFIED FEMALE: Back to you, gentleman up in the booth.
ANNOUNCER: From ABC News, This Week with George Stephanopoulos begins now.
GEORGE STEPHANOPOULOS, HOST: And we come on the air this morning to some breaking news, an earthquake measuring 6.0 near San Francisco, the largest tremor there since 1989. ABC's Ryan Owens is tracking the damage from California. Good morning, Ryan.
RYAN OWEN, ABC NEWS CORRESPONDENT: Good morning to you, George.
Yes, this was a sizable quake. And boy did it jolt people right out of bed at 3:30 this morning. The epicenter in Napa, California, that's wine country north of the San Francisco Bay area. No reports of deaths or serious injuries at this point, but there is plenty of damage.
Witnesses report a whole lot of broken glass, they say, in downtown Napa. You see some of that video there. A lot store fronts broken, things like that.
Among the most significant damage we've heard about is a fire at a mobile home park. The quake, we understand, caused a water main break, so firefighters do not have the water they need to battle that blaze.
About 15,000 people right now without power. And as you mentioned, this is the strongest quake to hit the Bay Area since the Loma Prieta earthquake in 1989. And that one, George, killed 63 and injured almost 4,000 people.
One last note, this event is not over yet. There have been almost two dozens aftershocks, most of them minor. But, George, these things have a way of keep coming.
STEPHANOPOULOS: And we know you'll be tracking it all. OK, Ryan, thanks very much.
Now to the battle against ISIS. President Obama returns to Washington tonight, the White House winning a dramatic expansion of air strikes using the ominous words imminent threat.
We analyze all the angles this morning. And we begin with the latest on the hunt for the killers of American James Foley. Here's ABC's chief investigative correspondent Brian Ross.
BRIAN ROSS, ABC NEWS CORRESPONDENT: A gruesome, heartbreaking videotape.
UNIDENTIFIED MALE: His last words were, I wish I had more time to see my family.
ROSS: A failed hostage rescue attempt inside Syria.
UNIDENTIFIED MALE: It turned out that hostages were no longer at that location.
ROSS: And a worldwide wakeup call about an Islamist terror group said to be more extreme and dangerous than al Qaeda.
BARACK OBAMA, PRESIDENT OF THE UNITED STATES: No just god would stand for what they did yesterday and what they do every single day.
ROSS: And in one week's time, the threat from the terror group called ISIS no longer seems limited to far away Iraq and Syria.
In a bulletin Friday, Homeland security said ISIS supporters are calling for attacks inside the U.S., although there are no credible threats at this time.