The CSIS Defense and Security Department (DSD) is a constant source of reliable analysis on the threats and opportunities shaping U.S. security interests.
Joined January 2015
- Tweets 31,677
- Following 891
- Followers 16,201
- Likes 4,064
3,539 Photos and videos
June 30 | Join @CSIS for the annual Global Security Forum for conversations featuring @SethGJones, Admiral Chris Grady, General Dave Goldfein, and General Austin Scott Miller on “The Future of Command: Leadership Through Crisis and Change.”
More here: csis.org/events/2026-global-…
1
3
382
"The World Cup presents a complex and dynamic threat surface that will be a ripe target set for malicious actors," writes CSIS expert Nikita Shah.
What are the key cyber threats to the 2026 World Cup, and how should the United States prepare? Read more: csis.org/analysis/cyber-thre…
1
3
8
1,878
June 30 I Join @CSISDefense for the annual Global Security Forum to discuss America at 250: A Defining Moment for American Statecraft and Military Power and featuring a panel on the future of command.
Learn more: csis.org/events/2026-global-…
2
3
18
2,673
The United States has used large parts of its missile inventories in the war with Iran. Rebuilding these stockpiles is expected to take years. Mark Cancian, Senior Adviser with @CSISDefense explains how these depletions create a "window of vulnerability" for the U.S.
2
10
16
2,547
June 30 | Join @CSIS for the annual Global Security Forum for conversations such as “What Must America Defend?: The Future of American Statecraft” featuring @SpeakerRyan, Vincent Viola, and @JenGriffinFNC.
More here: csis.org/events/2026-global-…
1
2
342
NEW: The U.S. must expand and modernize its force structure to deter two multi-theater wars. A new @CSISDefense report outlines a U.S. defense strategy to counter an axis led by China and Russia.
🧵Read more here: csis.org/analysis/wartime-fo…
10
19
49
6,506
"Depleted missile inventories have created a window of vulnerability for a potential Western Pacific conflict," write @CSISDefense experts. "The time needed to rebuild those inventories has thus become a major concern."
Learn more: csis.org/analysis/rebuilding…
6
15
33
3,750
"The threats facing the tournament are real and diffuse, but so are the countermeasures arrayed against them," write @CSIS_Threats experts on the 2026 World Cup.
Learn more about the threats to the tournament and the measures in place to stop them: csis.org/analysis/terrorist-…
3
10
2,262
NEW: The 2026 World Cup will be the largest sporting event ever held—and a magnet for terrorists of all stripes.
🧵@CSIS_Threats assesses the threats facing the tournament and the countermeasures being implemented against them: csis.org/analysis/terrorist-…
5
8
18
5,773
Depleted U.S. missile inventories have "created a window of vulnerability for a potential Western Pacific conflict," warns @CSISDefense. "The time needed to rebuild those inventories has thus become a major concern."
Learn more: csis.org/analysis/rebuilding…
3
26
63
11,611
How did the U.S. military’s first major #AI initiative come to life, and what does it mean for the future of warfare?
@EmilyHardingDC sat down with @KatrinaManson to discuss #ProjectMaven and more. Watch here: csis.org/events/dawn-ai-warf…
290
CSIS Defense and Security Department retweeted
May 27
Read the new analysis from @CSISDefense here: csis.org/analysis/rebuilding…
May 27
The U.S. will need years to replenish stockpiles of key weapons used in the Iran war, potentially limiting firepower in any other conflict, a new analysis says. apnews.com/article/iran-war-…
2
4
889
"The United States should work with key partners in Africa to build a twenty-first-century battle lab and supporting infrastructure," argue @csisfutures experts.
Read more about battle labs and testing all-domain operations: csis.org/analysis/testing-fu…
1
4
22
2,396
CSIS Defense and Security Department retweeted
May 27
Americas Program Deputy Director and Senior Fellow @CHernandezRoy joins @CSISDefense and security experts to unpack the U.S. pause on the Permanent Joint Board on Defense, and what it means for the future of U.S.-Canada security cooperation: csis.org/analysis/politics-a…
1
1
336
NEW DATA: "Defense Secretary Pete Hegseth stated it will take 'months and years...depending on the weapon system' to replenish U.S. inventories. @CSISDefense analysis of key munitions supports that assessment."
More on rebuilding U.S. missile inventory: csis.org/analysis/rebuilding…
3
6
27
3,559
"The United States is reducing its counterterrorism investment at a moment of growing uncertainty," writes @CSIS_Threats. "The result is not an inevitable catastrophe but a higher probability of surprise and a reduced capacity to prevent it."
Read more: csis.org/analysis/global-ter…
1
10
24
2,647
CSIS Defense and Security Department retweeted
Today at 1:00pm ET, please join the CSIS Defense and Security Department for a conversation on warfighting in space and its implications for deterrence and strategic stability.
csis.org/events/warfighting-…
1
3
7
662
In the latest episode of The Last Line of Defense, @SethGJones is joined by @CSISFreeman's Edgard Kagan to dissect the recent Trump–Xi summit and examine the challenges and dynamics that emerge from how the visit was portrayed in Chinese media.
Listen: csis.org/podcasts/last-line-…
1
4
6
3,036
TOMORROW | CSIS Intelligence, National Security, & Technology Department expert @EmilyHardingDC will sit down with Bloomberg reporter @KatrinaManson to discuss her new book, Project Maven: A Marine Colonel, His Team, and the Dawn of AI Warfare.
Register: csis.org/events/dawn-ai-warf…
10
25
2,977
The shooting at the Islamic Center of San Diego appears to be the first ideologically motivated lethal attack on a mosque in the United States this century.
Read the full analysis from @rileydmccabe @CSIS_Threats here: csis.org/analysis/san-diego-…
2
5
1,008