_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ , _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ .
t_ _ s s_ _ _ _ _ _ n is a_ _ o b_ _ _ g i_ _ _ _ _ _ _ _ _ _ d by b_ _ _ _ _ , w_ o a_ e c_ _ _ _ _ _ _ _ _ g p_ _ _ _ _ _ _ g an e_ _ _ _ _ _ d v_ _ _ _ _ n of t_ _ _ r 7_ 7 a_ _ _ _ _ _ t to t_ _ _ _ _ _ _ t t_ e c_ _ _ _ _ _ _ _ s of t_ e 7_ _ .
th_ s so_ _ _ _ _ n is al_ o be_ _ g in_ _ _ _ _ _ _ _ _ d by bo_ _ _ _ , who are co_ _ _ _ _ _ _ _ g pr_ _ _ _ _ _ g an en_ _ _ _ _ d ve_ _ _ _ n of th_ _ r 747 ai_ _ _ _ _ t to tr_ _ _ _ _ _ t the co_ _ _ _ _ _ _ s of the 7e_ .