Which clinic admits Charlotte Keene in Silo season 3's premiere summary?

Charlotte Keene is admitted to the Heidi Stensen Clinic in the premiere summary of Silo season 3.

The premiere shifts between Silo 18 after its rebellion and flashbacks set before the Silos were built. In the earlier storyline, Charlotte is a naval aviator whose squadron is struck by mysterious technology during a mission into Iran. Senator Rosalind Thurman arranges medical care for Charlotte at the clinic in Fairfax.

The clinic matters because Charlotte’s treatment connects the political thriller plot to Silo’s later memory-control mythology. When Daniel Keene visits, Charlotte no longer recognizes him, establishing that her medical treatment involves more than ordinary recovery from injuries. Later episodes identify Victor Crnkovich as her doctor and associate him with experimental memory suppression.

A common mix-up is confusing the clinic with Walter Reed or another real-world medical facility. The question asks for the fictional location named in the episode summary, not the hospital where a comparable real-life military patient might be treated.