Donaldson disputed the CWT fuel-air vapor explosion scenario, stating that ``In the history of aviation, there has never been an in-flight explosion in any Boeing airliner of a Jet-A kerosene fuel vapor/air mixture in any tank, caused by mechanical failure.'' Eyewitness, debris field, metallurgical, and victim injury evidence were all cited by Donaldson as proof of the missile-attack scenario. Donaldson acknowledged James Sanders' theory of an accidental shoot-down, and did not rule out U.S. Navy involvement; however, he viewed circumstantial evidence of a terrorist attack ``more compelling''.
Donaldson disputed the CWT fuel-air vapor explosion scenario, stating that ``In the history of aviation, there has never been an in-flight explosion in any Boeing airliner of a Jet-A kerosene fuel vapor/air mixture in any tank, caused by mechanical failure.''
nsubj
Number=Sing
Donaldson
Donaldson
PROPN
NNP
root
Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin
dispute
disputed
VERB
VBD
det
Definite=Def|PronType=Art
the
the
DET
DT
compound
Number=Sing
cwt
CWT
NOUN
NN
compound
Number=Sing
fuel
fuel
NOUN
NN
punct
-
-
PUNCT
HYPH
compound
Number=Sing
air
air
NOUN
NN
compound
Number=Sing
vapor
vapor
NOUN
NN
compound
Number=Sing
explosion
explosion
NOUN
NN
obj
Number=Sing
scenario
scenario
NOUN
NN
punct
,
,
PUNCT
,
advcl
VerbForm=Ger
state
stating
VERB
VBG
mark
that
that
SCONJ
IN
punct
``
``
PUNCT
``
case
in
In
ADP
IN
det
Definite=Def|PronType=Art
the
the
DET
DT
obl
Number=Sing
history
history
NOUN
NN
case
of
of
ADP
IN
nmod
Number=Sing
aviation
aviation
NOUN
NN
punct
,
,
PUNCT
,
expl
there
there
PRON
EX
aux
Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin
have
has
AUX
VBZ
advmod
never
never
ADV
RB
ccomp
Tense=Past|VerbForm=Part
be
been
VERB
VBN
det
Definite=Ind|PronType=Art
a
an
DET
DT
case
in
in
ADP
IN
punct
-
-
PUNCT
HYPH
compound
Number=Sing
flight
flight
NOUN
NN
nsubj
Number=Sing
explosion
explosion
NOUN
NN
case
in
in
ADP
IN
det
any
any
DET
DT
compound
Number=Sing
Boeing
Boeing
PROPN
NNP
nmod
Number=Sing
airliner
airliner
NOUN
NN
case
of
of
ADP
IN
det
Definite=Ind|PronType=Art
a
a
DET
DT
compound
Number=Sing
jet
Jet
PROPN
NNP
punct
-
-
PUNCT
HYPH
det
Definite=Ind|PronType=Art
a
A
DET
DT
compound
Number=Sing
kerosene
kerosene
NOUN
NN
compound
Number=Sing
fuel
fuel
NOUN
NN
compound
Number=Sing
vapor
vapor
NOUN
NN
cc
/
/
SYM
,
conj
Number=Sing
air
air
NOUN
NN
nmod
Number=Sing
mixture
mixture
NOUN
NN
case
in
in
ADP
IN
det
any
any
DET
DT
nmod
Number=Sing
tank
tank
NOUN
NN
punct
,
,
PUNCT
,
acl
Tense=Past|VerbForm=Part
cause
caused
VERB
VBN
case
by
by
ADP
IN
amod
Degree=Pos
mechanical
mechanical
ADJ
JJ
obl
Number=Sing
failure
failure
NOUN
NN
punct
.
.
PUNCT
.
punct
''
''
PUNCT
''
Eyewitness, debris field, metallurgical, and victim injury evidence were all cited by Donaldson as proof of the missile-attack scenario.
nsubj:pass
Number=Sing
eyewitness
Eyewitness
NOUN
NN
punct
,
,
PUNCT
,
compound
Number=Sing
debris
debris
NOUN
NN
conj
Number=Sing
field
field
NOUN
NN
punct
,
,
PUNCT
,
conj
Number=Sing
metallurgical
metallurgical
NOUN
NN
punct
,
,
PUNCT
,
cc
and
and
CCONJ
CC
compound
Number=Sing
victim
victim
NOUN
NN
compound
Number=Sing
injury
injury
NOUN
NN
conj
Number=Sing
evidence
evidence
NOUN
NN
aux:pass
Mood=Ind|Number=Plur|Person=3|Tense=Past|VerbForm=Fin
be
were
AUX
VBD
advmod
all
all
ADV
RB
root
Tense=Past|VerbForm=Part|Voice=Pass
cite
cited
VERB
VBN
case
by
by
ADP
IN
obl
Number=Sing
Donaldson
Donaldson
PROPN
NNP
case
as
as
ADP
IN
obl
Number=Sing
proof
proof
NOUN
NN
case
of
of
ADP
IN
det
Definite=Def|PronType=Art
the
the
DET
DT
compound
Number=Sing
missile
missile
NOUN
NN
punct
-
-
PUNCT
HYPH
compound
Number=Sing
attack
attack
NOUN
NN
nmod
Number=Sing
scenario
scenario
NOUN
NN
punct
.
.
PUNCT
.
Donaldson acknowledged James Sanders' theory of an accidental shoot-down, and did not rule out U.S. Navy involvement; however, he viewed circumstantial evidence of a terrorist attack ``more compelling''.
nsubj
Number=Sing
Donaldson
Donaldson
PROPN
NNP
root
Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin
acknowledge
acknowledged
VERB
VBD
nmod:poss
Number=Sing
James
James
PROPN
NNP
flat
Number=Sing
Sanders
Sanders
PROPN
NNP
case
's
'
PART
POS
obj
Number=Sing
theory
theory
NOUN
NN
case
of
of
ADP
IN
det
Definite=Ind|PronType=Art
a
an
DET
DT
amod
Degree=Pos
accidental
accidental
ADJ
JJ
compound
Number=Sing
shoot
shoot
NOUN
NN
punct
-
-
PUNCT
HYPH
nmod
down
down
ADV
RB
punct
,
,
PUNCT
,
cc
and
and
CCONJ
CC
aux
Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin
do
did
AUX
VBD
advmod
not
not
PART
RB
conj
VerbForm=Inf
rule
rule
VERB
VB
compound:prt
out
out
ADP
RP
compound
Number=Sing
U.S.
U.S.
PROPN
NNP
compound
Number=Sing
Navy
Navy
PROPN
NNP
obj
Number=Sing
involvement
involvement
NOUN
NN
punct
;
;
PUNCT
:
advmod
however
however
ADV
RB
punct
,
,
PUNCT
,
nsubj
Case=Nom|Gender=Masc|Number=Sing|Person=3|PronType=Prs
he
he
PRON
PRP
parataxis
Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin
view
viewed
VERB
VBD
amod
Degree=Pos
circumstantial
circumstantial
ADJ
JJ
obj
Number=Sing
evidence
evidence
NOUN
NN
case
of
of
ADP
IN
det
Definite=Ind|PronType=Art
a
a
DET
DT
amod
Degree=Pos
terrorist
terrorist
ADJ
JJ
nmod
Number=Sing
attack
attack
NOUN
NN
punct
``
``
PUNCT
``
advmod
Degree=Cmp
more
more
ADV
RBR
appos
Degree=Pos
compelling
compelling
ADJ
JJ
punct
'
'
PUNCT
''
punct
'
'
PUNCT
''
punct
.
.
PUNCT
.