今日英语学习：读 11／4／2015 CNN 片段 － 俄国客机空难 - ISIS bomb?

[19:00:07] ERIN BURNETT, CNN ANCHOR: 
OUTFRONT next, we're following the major breaking news tonight. U.S. Intelligence suggesting a bomb planted by ISIS blew up Metrojet Flight 9268 mid-air killing all 224 people on board. If true, it's the most significant terror attack in the sky since 9/11. Let's go OUTFRONT.

Good evening to our viewers in the United States and around the world. I'm Erin Burnett. OUTFRONT tonight, the breaking news, ISIS bomb. In a shocking assessment, U.S. officials tells CNN that intelligence suggests it was a bomb planted by ISIS or an ISIS affiliate that brought down Metrojet Flight9268 killing all 224 people on board. If true, the take down of the jumbo jet would be the most significant terror attack since 9/11. The first time after several failed attempt the Islamic were able to blow up a passenger jet in flight. Two additional government sources say that terrorist chatter which could be online or cellphone discussions indicates that a bomb took down the plane. U.S. officials also say they suspect the bomb was planted in luggage by someone at the airport. So what set the bomb off? One possibility intelligence agents are looking at is that it was triggered by a barometric pressure switch, which would be set to go off at a certain altitude. We are covering the story from every angle around the world tonight. 
Barbara Starr is at the Pentagon. Erin McLaughlin is in Sharm El-Sheikh, Egypt. Jim Acosta is at the White House. Miguel Marquez is here in New York. We begin with Barbara Starr who broke the story. And Barbara, what are you learning tonight?