it appears to show steven sotloff detapcated by a -- decapitated by a member of isis. steven sotloff was a journalist. he turned up in a video last month when isis beheaded james foley. the militants threatened to kill steven sotloff next if the u.s. would not stop pelting iraq with airstrikes. in the video, the militant group says it will make lives unless u.s. bombings stop. the a.p. reports the family knows about the video and is grieving. >> the intelligence community will work as quickly as possible to determine its authenticity. if the video is genuine we are sickened by this brutal act taking the life of another innocent american citizen. >> reporter: the president says airstrikes are necessary to protect iraqi civilians and to keep isis from attacking u.s. facilities and personnel. reporting live in washington, jacqueline fell, ktvu channel 2 news. >> all right. thank you. >>> well, in just about 45 minutes, we are expecting to hear from 49ers' head coach for the first time since ray mcald was arrested over -- ray mcdown ald was -- ray mcdonald was arrested for