claiming responsibility and this group has not been identified before now. they earned an iranian man performed with the passports. it is being examined to make sure it is tied to the plane and they expanded the search area. they are sending a second warship that dozens currently scouring an area about the size of pennsylvania. the plane involved in this, the boeing has a stellar safety record. the last accident, last year's crash in northern california was likely pilot error. renee covers this for more on the background. >> the boeing 777 is one of the