here, what is causing this to happen? the numbers just absolutely staggering. so the military always has investigations into all of these incidents. there could be a good deal of concern that this may involve lack of money for readiness and training in some cases. we do not know for sure, but readiness and training has been an ongoing issue. of course, the investigations could find other reasons. they could find mechanical error, crew error. we don't know. let's come back to where we began, in the last three weeks, 14 service members losing their lives in aircraft accidents while on duty. erica? >> barbara starr, appreciate it as always. thank you. new video shows three buses believed to be carrying expelled american diplomats leaving the u.s. embassy in moscow. russia ordering 60 american diplomats to leave the country by today in retaliation for the