front lines dealing with this chaos, they described a frightening scene. >> i encourage everyone in every community, no matter what size, if you're in the middle of the desert, urban area, to prepare in advance. unfortunately, it may not be a matter of if, it may be a matter of when. it stops with knowing how to stop bleeding, how to do chest compressions. this is something that we as americans can do. >> reporter: and, manu, we have been told here this morning by odessa police, there has been a press conference scheduled for 9:30 central time. it has now been pushed back into noon central time, so 1:00 eastern before we get any more information as investigators here continue working around the clock to piece together how all of this unfolded and determining a motive behind the attack. . >> a lot of unanswered