In my first book, The Second Korean War, an anti-aircraft missile is fired from an American Virginia class submarine. Is that really possible?

Here’s information on this topic posted on thedrive.com in 2017:

“Tests during the mid 2000s had the AIM-9X fired from a vertical launcher as a proof of concept demonstration. A few years later, an AIM-9X was launched from an actual submarine as part of a series of integration tests. Since then the program seems to have disappeared from public view, but it’s likely development has continued on in the classified world—especially considering that submarine-launched unmanned aircraft have been an operational reality within America’s nuclear submarine fleet for some time.”

It appears the answer is -yes, it is possible. Has this capability actually been deployed?

I doubt we will find out until an American submarine comes under air attack.