An official website of the United States government
Here's how you know
A .mil website belongs to an official U.S. Department of Defense organization in the United States.
A lock (lock ) or https:// means you’ve safely connected to the .mil website. Share sensitive information only on official, secure websites.

HomeNewsArticle Display

United States Space Force establishes Space Delta 4

Space Delta 4

Space Delta 4 title


Col. Richard “Bear” Bourquin assumes command of the newly-formed Space Delta 4, during a virtual ceremony hosted by Gen. Jay Raymond, Chief of Space Operations, July 24, continuing the alignment of units within the U.S. Space Force. DEL 4 will operate and support both space and ground-based sensors to provide strategic and theater missile warning to the U.S. and international partners.

As part of the activation, Buckley AFB divided and expanded the former 460th Space Wing into two separate, but equal organizations. The previous 460th Space Wing Vice Commander, Col. Bourquin has assumed command of DEL 4, formed from operational elements of the now-inactivated 460th and 21st Space Wings.

In addition to providing Overhead Persistent Infrared surveillance to Combatant Commanders through a constellation of satellites known as the Space Based Infrared Systems, DEL 4 commands several powerful ground-based radars. These radars are in key positions across the globe to provide early detection of Sea-Launched Ballistic Missiles and Intercontinental Ballistic Missiles. In essence, DEL 4 provides early missile warning capabilities to the U.S. missions at home and abroad, and includes support to our nation’s allies.

“As a career space officer that has worked multiple missile warning assignments over the last 24 years, including my first assignment as a Defense Support Program operator, I am excited to have the opportunity to integrate all of USSF’s missile warning capabilities into a single organization that can better detect and report on current and emerging missile threats and protect the U.S. and our international partners,” said Bourquin.

“We need to be able to see what everyone is doing before they do it,” said Chief Master Sergeant Willie Frazier II, DEL 4 senior enlisted leader. “The more warning we can provide, the better off we’ll be at detecting exactly where the threats are going to land, and then give our people ample forewarning. It’s imperative we provide these capabilities better than anyone else on the planet.”

DEL 4 operates in various world-wide locations to include Buckley AFB; Cape Cod Air Force Station, Massachusetts; Beale AFB, California; Cavalier AFS, North Dakota; and Thule Air Base, Greenland and Clear AFS, Alaska. 

The USSF also stood up seven other operational Space Deltas, continuing to align units in a manner that maintains dominance and superiority in a contested, degraded, and operationally-limited environment. These Space Deltas are: Space Delta 2 (Space Domain Awareness), Space Delta 3 (Space Electronic Warfare), Space Delta 5 (Command and Control), Space Delta 6 (Cyber), Space Delta 7 (Intelligence, Surveillance & Reconnaissance), Space Delta 8 (SATCOM-NAVWAR) and Space Delta 9 (Orbital Warfare).

USAF Comments Policy
If you wish to comment, use the text box below. AF reserves the right to modify this policy at any time.

This is a moderated forum. That means all comments will be reviewed before posting. In addition, we expect that participants will treat each other, as well as our agency and our employees, with respect. We will not post comments that contain abusive or vulgar language, spam, hate speech, personal attacks, violate EEO policy, are offensive to other or similar content. We will not post comments that are spam, are clearly "off topic", promote services or products, infringe copyright protected material, or contain any links that don't contribute to the discussion. Comments that make unsupported accusations will also not be posted. The AF and the AF alone will make a determination as to which comments will be posted. Any references to commercial entities, products, services, or other non-governmental organizations or individuals that remain on the site are provided solely for the information of individuals using this page. These references are not intended to reflect the opinion of the AF, DoD, the United States, or its officers or employees concerning the significance, priority, or importance to be given the referenced entity, product, service, or organization. Such references are not an official or personal endorsement of any product, person, or service, and may not be quoted or reproduced for the purpose of stating or implying AF endorsement or approval of any product, person, or service.

Any comments that report criminal activity including: suicidal behaviour or sexual assault will be reported to appropriate authorities including OSI. This forum is not:

  • This forum is not to be used to report criminal activity. If you have information for law enforcement, please contact OSI or your local police agency.
  • Do not submit unsolicited proposals, or other business ideas or inquiries to this forum. This site is not to be used for contracting or commercial business.
  • This forum may not be used for the submission of any claim, demand, informal or formal complaint, or any other form of legal and/or administrative notice or process, or for the exhaustion of any legal and/or administrative remedy.

AF does not guarantee or warrant that any information posted by individuals on this forum is correct, and disclaims any liability for any loss or damage resulting from reliance on any such information. AF may not be able to verify, does not warrant or guarantee, and assumes no liability for anything posted on this website by any other person. AF does not endorse, support or otherwise promote any private or commercial entity or the information, products or services contained on those websites that may be reached through links on our website.

Members of the media are asked to send questions to the public affairs through their normal channels and to refrain from submitting questions here as comments. Reporter questions will not be posted. We recognize that the Web is a 24/7 medium, and your comments are welcome at any time. However, given the need to manage federal resources, moderating and posting of comments will occur during regular business hours Monday through Friday. Comments submitted after hours or on weekends will be read and posted as early as possible; in most cases, this means the next business day.

For the benefit of robust discussion, we ask that comments remain "on-topic." This means that comments will be posted only as it relates to the topic that is being discussed within the blog post. The views expressed on the site by non-federal commentators do not necessarily reflect the official views of the AF or the Federal Government.

To protect your own privacy and the privacy of others, please do not include personally identifiable information, such as name, Social Security number, DoD ID number, OSI Case number, phone numbers or email addresses in the body of your comment. If you do voluntarily include personally identifiable information in your comment, such as your name, that comment may or may not be posted on the page. If your comment is posted, your name will not be redacted or removed. In no circumstances will comments be posted that contain Social Security numbers, DoD ID numbers, OSI case numbers, addresses, email address or phone numbers. The default for the posting of comments is "anonymous", but if you opt not to, any information, including your login name, may be displayed on our site.

Thank you for taking the time to read this comment policy. We encourage your participation in our discussion and look forward to an active exchange of ideas.