188 Nuclear Forensic Analysis
frightening. The best HE available at that time could not induce the same compres-
sion
o
f
t
he
ssile
f
uel
t
hat
ca
n
b
e
a
ccomplished
t
oday.
A
s
a
r
esult,
t
he
P
u
f
uel
o
f
t
he
d
evice,
p
laced
at
t
he
c
enter
o
f
t
he
m
oderating
a
nd
r
eecting
H
E,
w
as
p
erilously
c
lose
t
o
a
k
=
1
a
rrangement,
e
ven
i
n
i
ts
u
ncompressed
c
onguration.
T
here
w
ere
c
oncerns
t
hat,
h
ad
t
he
B
-29
ca
rrying
t
he
w
eapon
c
rashed
o
n
t
akeoff
f
rom
T
inian
I
sland,
t
here
could have been sufcient nuclear yield to cause heavy damage to the military instal-
lations
[
11].
T
his
l
ed
e
ventually
t
o
t
he
c
oncept
o
f
“
one-point
s
afe”:
a
ny
U
S
s
tockpile
w
eapon
w
ill
n
ot
p
roduce
a
ppreciable
n
uclear
y
ield
u
nless
t
he
H
E
i
s
d
etonated
i
n
t
he
p
rescribed fashion [12].
Using
t
he
i
mplosion ...