Those killed hail from seven states . The mortarman was 20 . One has been in the Marines since 2008 , another joined a few months ago . The youngest was 19 years old and the oldest was 72. Authorities still do n't know why the mortar system `` failed to function as designed ''
Those killed hail from seven states . One has been in the Marines since 2008 , another joined a few months ago . The youngest was 19 years old and the oldest was 72. Authorities still do n't know why the mortar system `` failed to function as designed ''