 That was another-it was evidently another aircraft that hit the tower.
( That ( ( was ( another-it ( ( was evidently ) ( ( another aircraft ) ( that ( hit ( the tower ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT That)) (VP (VBD was) (ADJP (JJ another-it) (SBAR (S (VP (VBD was) (ADVP (RB evidently)) (NP (NP (DT another) (NN aircraft)) (SBAR (WHNP (WDT that)) (S (VP (VBD hit) (NP (DT the) (NN tower))))))))))) (. .)))
Apparently another aircraft smashed into the tower.  
( Apparently ( ( another aircraft ) ( ( smashed ( into ( the tower ) ) ) . ) ) )
(ROOT (S (ADVP (RB Apparently)) (NP (DT another) (NN aircraft)) (VP (VBD smashed) (PP (IN into) (NP (DT the) (NN tower)))) (. .)))