F-35 stealth fighter drops a GPS-guided bomb during testing |
by JAMES DREW
Earlier
this month, Defense Secretary Ashton Carter told CNN the United States military has the capability to “shut down, set back and destroy” Iran’s nuclear program.
The
highly-publicized yet classified weapon Carter was referring to is the
Massive Ordnance Penetrator — a behemoth, 30,000-pound bunker bomb
introduced specifically to destroy Iran’s underground uranium enrichment
facilities.
In January, we
told you the Pentagon was modifying and testing the bomb as the
diplomatic push for a nuclear settlement with the pariah state
intensified. But of course, that’s not all the U.S. military has been up
to in the background.
The
Air Force, which leads the development of air-delivered bunker bombs, is
preparing to go shopping for a new “family” of weapons to kill
fortified targets — and it’s compiling that shopping list right now.
This
list is likely to include a new rocket-rammed High Speed Strike Weapon
for the F-35 Joint Strike Fighter, plus a new class of inexpensive,
mid-weight penetrating bombs.
And as a last resort, the U.S. government is holding onto its only earth-penetrating nuclear bomb, the B61–11, even as it reduces its nuclear stockpile to comply with an arms reduction treaty with Russia.
The Air Force definitely wants to make more improvements to the Massive Ordnance Penetrator, since a third and fourth “enhanced threat reduction”
modification program is included in its 2016 budget plans. The service
is also about to scale up production of a smart, void-sensing fuze that
counts bunker layers and detonates at the correct level.
An Air Combat Command review
of the flying branch’s so-called hard-target munitions inventory
recently wrapped up, and that study is circulating among senior leaders
within the department and the Office of the Secretary of Defense.
The
classified study assessed what the Air Force currently has, and what it
might need in the future as nations like Iran and North Korea find new
ways to harden their military installations against attack from the
West.
The Air Force won’t
say much about the study officially, but senior service officials have
been dropping hints as Congress seeks assurances about the military’s
ability to destroy Iran’s nuclear sites should diplomacy fail.
The
service’s chief scientist told House lawmakers in March that a research
program to develop a 2,000-pound hard-target killer for the F-35 and
other modern fighters and bombers is ready to transfer to an acquisition
program.
The Air Force needs a smaller, more compact weapon to destroy hard and deeply buried targets, Walker said at the hearing.
“The
High Velocity Penetrating Weapon was a program that we put together to
do this,” he continued. “[It has] been very successful and now it’s
transitioned that technology into the follow-on program that Air Combat
Command is now looking at in their analysis of alternatives.”
There
has been surprisingly little discussion about the weapon program since
2011, when the Air Force paid military contractors Lockheed Martin and
Raytheon to design prototypes, which were due to undergo sled-testing
last year.
According to an Air Force presentation from 2011,
the bomb would fit inside the F-35’s internal weapons bay for stealth.
To overcome the size and weight constraints, a rocket motor would ram
the hardened, high-explosive warhead into the target.
The
Massive Ordnance Penetrator is a gigantic bomb with plenty of punching
power because of its sheer size. But it only fits on the Air Force’s B-2
and B-52 bombers, whereas the High Velocity Penetrating Weapon would be
compatible with more aircraft types — and overcome its relatively small
size with speed.
According to Maj. Gen. Scott Jansson, the Air Force’s top weapons-buyer, the flying branch probably won’t ever produce MOP in large numbers.
“We’re
looking at less-expensive weapons than MOP that we can build in greater
quantities, but MOP was considered in that analysis as well,” Jansson
said. “[It] might be part of a family of capabilities that can hold
certain targets at risk.”
One
program Jansson is about to approve for production is Orbital ATK’s
Hard Target Void Sensing Fuze. The company completed development of the
smart fuze last month, and the Air Force and Navy plan to purchase 5,500
of them over the next few years to replace the existing time-delayed
fuzes on older penetrating warheads.
“It’s
a big deal,” Jansson said in a March interview. “It’s a significantly
improved fuze over anything that we have today. If we have the
intelligence that says we want to target the third floor down in an
underground bunker, we will program the fuze to ignite in that layer.”
If
all conventional means fail to destroy a target, there’s the B61–11
nuclear option. The National Nuclear Security Administration is reducing
its five B61 nuclear bomb variants to one, the B61–12 — except for the
bunker-busting variant that debuted in the 1990s.
“I
see an enduring role for the ability of the U.S. Air Force to be able
to take out deeply-buried, hardened targets,” Maj. Gen. Garrett
Harencak, Air Force assistant chief of staff for strategic deterrence,
said in an April 20 interview. “We will do that for the nation, and in
order to do that we have an array of assets and weapons to do that in a
credible manner, and not just nuclear weapons.
“We
don’t have a set retirement date yet for the B61–11. It was actually
more recently introduced into the stockpile, but it will continue for a
while.”
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