Activity Saw Developments News Today

Were following another missile launch by north korea. this one an apparent failure. barbara starr working it for us. the second launch in recent days. what are we learning. >> reporter: this is fascinating. north korea tried again to launch a mobile missile, failing against for the second time this month. the reason so concerning, in wartime it can move around very easily, the mobile missing. there is more to this story. u.s. intelligence satellites monitoring the activity saw developments at th...