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Publications
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Congressional Testimony
Videos
On the Issues
Over-the-Horizon Counterterrorism
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About
Publications
Commentary
Research & Reports
Congressional Testimony
Videos
On the Issues
Over-the-Horizon Counterterrorism
Contact
More
About
Publications
Commentary
Research & Reports
Congressional Testimony
Videos
On the Issues
Over-the-Horizon Counterterrorism
Contact
Commentary
Katherine Zimmerman's latest short articles, op-eds, and blogs.
Congress Missed an Opportunity to Ask the Right Questions on Yemen
The Hill
, December 16, 2022
The Dangers of Iran's Drones in Ukraine
with Cleary Waldo,
The Hill
, October 30, 2022
Amid Yemen's truce, al Qaeda threatens to return
with Brian Carter,
AEIdeas
, September 9, 2022
What Zawahiri's death means for al Qaeda
AEIdeas
, August 2, 2022
Biden's misleading parallel between Syria and Afghanistan
The Dispatch
, July 18, 2022
The Houthis still have the upper hand in Yemen
Foreign Policy
, June 15, 2022
Biden is right to send troops to Somalia, but political progress is needed
AEIdeas
, May
15
, 2022
Relying on 'over-the-horizon' counterterrorism increases risk to civilians
The Hill
,
May 9
, 2022
Saudi Arabia's war in Yemen
AEIdeas
, March 23, 2022
Is ISIS in crisis?
with Emily Estelle
AEIdeas
, March 11, 2022
Yemen has become an Iranian proxy war against Israel
with Nicholas A. Heras
Foreign Policy
, January 24, 2022
2021
How "diplomacy first' has failed in Yemen
The Dispatch
, November 12, 2021
Reflecting on 9/11 twenty years later
Symposium contributor
AEIdeas
, September 10, 2021
Al Qaeda & ISIS 20 years after 9/11
The Islamists
, September 8, 2021
Afghanistan is set to become a sanctuary for extremists
The Hill
, September 2, 2021
Bin Laden's legacy lives on
AEIdeas
, April 29, 2021
Biden can't bring peace to Yemen while Iran keeps sending weapon
s
with Brad Bowman
Foreign Policy
, March 4, 2021
Biden should reverse Trump's decision on Somalia
Critical Threats Project at the American Enterprise Institute
, January 28, 2021
2020
US needs to take on a leadership role to secure its interests in Yemen
Middle East Institute
, December 16, 2020
Trump's short-sighted request to withdraw troops from Somalia
with Emily Estelle
AEIdeas
, October 15, 2020
Al Qaeda's generational change
Newsweek
, September 8, 2020
ISIS: Resilient on sixth anniversary
Symposium contributor
The Islamists
, June 18, 2020
Al Qaeda's return
AEIdeas
, June 4, 2020
Al Qaeda's role in the Pensacola shooting and what it means
AEIdeas
, May 18, 2020
The Yemen war at 5 years
AEIdeas
, March 26, 2020
Why the US should spend 0.3 percent of its defense budget to prevent an African debacle
Military Times
, March 12, 2020
Iran's man in Yemen and the al Houthis
AEIdeas
, January 16, 2020
20
19
Practice makes perfect. Why we should care about terror attacks in Africa.
AEIdeas
,
November 8
, 2019
The current US approach to terror is a recipe for forever war
Defense One
,
October 31, 2019
Congratulations, Baghdadi is dead. But we’re no closer to victory in the ‘forever war.’
AEIdeas
, October
29
, 2019
Yemen's Houthi movement can still be split from Iran
RealClearWorld
,
April 8,
2019
Trump doubles down on failed counterterror policy
Wall Street Journal
,
February 19,
2019
The Salafi-jihadist movement is winning
RealClearWorld
,
February 13
, 2019
201
8
The
assault on al Hudaydah: Surfacing America's partnership problems
Critical Threats Project at the American Enterprise Institute
, June 13
, 201
8
2018 Red Sea coast offensive
with Maher Farrukh
Critical Threats Project at the American Enterprise Institute
, June
5
, 2018
The never-ending war on terror
Foreign Affairs
,
May 11
, 2018
Al Shabaab persists in Somalia
with Emily Estelle and Matthew Cassidy
Critical Threats Project at the American Enterprise Institute
,
February 7
, 2018
2018 forecast: U.S. faces converging threats
with Emily Estelle
Critical Threats Project at the American Enterprise Institute
, January 10, 2018
201
7
Only the US can reach a peaceful political settlement in Yemen
The Hill
,
December 30, 2017
President Saleh is dead. What's next for Yemen?
with Maher Farrukh
Critical Threats Project at the American Enterprise Institute
, December
4
, 2017
Are political Islamists America's enemies in the fight against terrorism?
with Robin Simcox
AEIdeas
,
October 10
, 2017
Trump’s Syria Rebel Move: A Victory for Assad, Iran and Putin?
CNN Global Briefing
, July 21, 2017
In the fight against jihadist ideology, win the people to win the war
The Hill
,
July 19
, 2017
The Manchester bombing is a wake up call for America and Europe
The Hill
,
May 24,
2017
Warning update: Fracturing of the Yemeni state
with Maher Farrukh and Tyler Nocita
Critical Threats Project at the American Enterprise Institute
,
May 12
, 2017
Warning to the Trump administration: Be careful about Yemen
Fox News
,
February 28
, 2017
How the U.S. should re-engage in Yemen
Critical Threats Project at the American Enterprise Institute
,
February 24
, 2017
Pushing back on Iran: Policy options in Yemen
Critical Threats Project at the American Enterprise Institute
,
February 7, 2017
201
6
A new ISIS branch in the Sahel?
with Emily Estelle
Critical Threats Project at the American Enterprise Institute,
November 15, 2016
W
arning update: al Qaeda's global attack campaign
with Jennifer Cafarella
Critical Threats Project at the American Enterprise Institute,
November
6
, 2016
5 questions that every presidential candidate should answer: al Qaeda edition
AEIdeas
,
November
2
, 2016
Avoiding al
Qaeda's
Syria trap: Jabhat al Nusra's rebranding
with Jennifer Cafarella
Critical Threats Project at the American Enterprise Institute,
July 29
, 2016
Al Mukalla is not Raqqa
AEIdeas,
May 3, 2016
Symposium: A preview of Obama’s trip to Saudi Arabia
contributor
AEIdeas,
April 18
, 2016
Did al Shabaab get a bomb on a plane? or not?
AEIdeas
,
February 5
, 2016
201
5
San Bernadino shooting a terrorist attack with al Qaeda and ISIS footprints
with
Harleen Gambhir, Kimberly Kagan and Frederick W. Kagan
Critical Threats Project at the American Enterprise Institute,
December 4, 2015
Why yesterday's bombings in Yemen matter
AEIdeas,
October 7
, 2015
One-two punch of al Wahayshi and Belmokhtar will have little effect on defeating al Qaeda
AEIdeas,
June 16, 2015
AQAP jailbreak is just another problem for Yemen
AEIdeas,
April 2,
2015
5 questions every presidential candidate should answer: Yemen edition
AEIdeas
,
March 26
, 2015
Why America's Yemen policy is failing
C
NN,
February 13
, 2015
What's happening in Yemen?
AEIdeas,
January
21,
2015
Al Qaeda’s role in Paris attacks underscores failings of counterterrorism strategy
AEIdeas
,
January
1
4
, 2015
201
4
AQAP hostage Somers is a symptom of Yemen model problems
AEIdeas,
December 4
, 2014
Same script, different city: al Shabaab's hold in Somalia
AEIdeas,
October 6
, 2014
Who are the Khorasan?
AEIdeas,
September 2
3
, 2014
Yemen’s government shake-up highlights limitations of Obama’s ‘Yemen model’
AEIdeas,
September
22
, 2014
Obama's counterterrorism strategy is already failing
US News
, September 11, 2014
Don't replicate the failure of Yemen
The Weekly Standard
, September
11
, 2014
Al Qaeda is not dead
AEIdeas,
September 4,
2014
A successful strike against al Shabaab?
Critical Threats Project at the American Enterprise Institute
,
September 2,
2014
Did AQAP declare support for the Islamic State?
AEIdeas,
August 20,
2014
Yemen model won't work in Iraq, Syria
Washington Post,
J
uly 17
, 2014
Doubling-down on a losing al Qaeda strategy
AEIdeas,
May
24
, 2014
The next chapter in Yemen's military offensive
AEIdeas,
May 9
, 2014
Understanding al Qaeda's leadership group
AEIdeas,
April
24
, 2014
If we're not winning in Yemen, are we really winning against al Qaeda?
AEIdeas
,
April 16
, 2014
Al Qaeda never recognized the Islamic State in Iraq and Syria
AEIdeas,
February 4
, 2014
A new definition for al Qaeda
Washington Post
,
January 31, 2014
201
3
Al Qaeda renewed: it is decentralized and dangerous
National Review
,
December 18, 2013
Taking out al Qaeda one by one? It sounds absurd . . . because it is.
AEIdeas
,
October 7
, 2013
Al Qaeda
's African surge threatens the U.S.
Wall Street Journal
,
September 24
, 2013
We are losing the fight against al Shabaab
CNN Global Public Square
,
September 2
3
, 2013
Al Qaeda's critical threat
AEIdeas
, August 6, 2013
Al Qaeda threat to American interests
Critical Threats Project at the American Enterprise Institute
, August 5, 2013
Deadly
attacks in Sinai highlight the region's growing instability
AEIdeas,
July
23
, 2013
The death of al Qaeda in the Arabian Peninsula's deputy leader
AEIdeas,
J
uly 17,
2013
Keep an eye on Somalia
AEIdeas,
June 10
, 2013
Spillover from Mali
AEIdeas,
May 23
, 2013
Questions on Mali
Critical Threats Project at the American Enterprise Institute
,
January 23
, 2013
2012
Changing landscape: Jihad in Mali
with
Dominic Lisanti
Critical Threats Project at the American Enterprise Institute
, December
13
, 2012
Striking Iran: the target's in Khartoum
AEIdeas
, October 25, 2012
The fall of Kismayo
AEIdeas
,
October 3, 2012
Said al Shihri reported dead
AEIdeas
,
September 10,
2012
Countering Ansar al Sharia in Yemen
AEIdeas
,
August 6, 2012
Mission not accomplished yet in south Yemen
AEIdeas
,
June
30,
2012
Defining success against al Qaeda in Yemen
AEIdeas
,
May 12, 2012
Al Shabaab in decline?
Critical Threats Project at the American Enterprise Institute
,
May 8
, 2012
Al Qaeda’s Yemen-based affiliate is alive and well
Daily Caller
, May 8, 2012
Yemen's military shake-up: Saleh's cronies get the boot
AEI
,
April 12,
2012
5 reasons to watch Yemen
AEIdeas
, February
23
, 2012
Al Qaeda officially welcom
es al Shabaab
AEIdeas
,
February 9
, 2012
2011
Yemen's Spring: it's still a mess
AEIdeas,
December
23,
2011
AEI debate prep: How to respond to the growing threat from the Gulf of Aden
AEIdeas,
November 7,
2011
Al Shabaab suicide bombing in Mogadishu
Critical Threats Project at the American Enterprise Institute
, October 4, 2011
Killing Anwar al Awlaki
Critical Threats Project at the American Enterprise Institute
, September 30, 2011
Awlaki killing may not be a lasting blow to al Qaeda
The Weekly Standard
, September 30, 2011
He's back: Implications of Saleh's return to Yemen
Critical Threats Project at the American Enterprise Institute
, September 23, 2011
Ten years after 9/11: al Qaeda's reemergence in Yemen
Critical Threats Project at the American Enterprise Institute
, September 20, 2011
Al Shabaab's withdrawal from Mogadishu
Critical Threats Project at the American Enterprise Institute
, August 7, 2011
U.S. reportedly strikes terrorist in Yemen
The Weekly Standard
, July 15,
2011
Yemen's loss, al Qaeda's gain
National Review Online: The Corner
, July 12,
2011
From Somalia to Nigeria: Jihad
The Weekly Standard
, June
18
,
2011
Suicide attacks a reminder of terrorists' strength in Somalia
AEIdeas
, June
10
,
2011
Yemen on verge of civil war: this could get ugly
AEIdeas
, June 3,
2011
Yemen slides toward civil war
The Weekly Standard
, June 3,
2011
Al Qaeda in the Arabian Peninsula ready to step in
Enterprise Blog,
May 2, 2011
Quick take: al Qaeda and its affiliates exploit Yemen unrest
Critical Threats Project at the American Enterprise Institute
, April 4, 2011
Yemen protests: U.S. policy in crisis
Critical Threats Project at the American Enterprise Institute
, March 23, 2011
The Somali pirate threat isn't going away
The Huffington Post
, February 22, 2011
Yemen is not Egypt, and that's a problem
AEIdeas,
February 18,
2011
Twenty years since the Somalian government's collapse
AEIdeas,
January 26
, 2011
201
0
and earlier
The shifting tactics of AQAP
The Corner: National Review Online
, November 24, 2010
AQAP and the "parcel plot": assessing this critical threat
AEIdeas
,
November 5
, 2010
Deadly days in Mogadishu
AEIdeas
,
September 23
, 20
10
Terrorists wage war on Mogadishu
The Corner: National Review Online
, August 25, 2010
Al Shabaab effectively recruits Americans
with Chris Harnisch
The Weekly Standard
, August 10, 2010
Radical cleric calls for American Muslims to fight U.S.
with
Charlie Szrom
The Weekly Standard
,
March 22
, 2010
January 15th strike: Targeting al Qaeda in the Arabian Peninsula (AQAP) leaders and implications
Critical Threats Project at the American Enterprise Institute
, January 16, 2009
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