Most of it in Quantico (or by Quantico, I think), which is one of several consolidation points, i.e. data bases.  I believe, and then you have sources and systems and how they capture, process, trigger, share and store things along the way.

From: Tom Jones <thomasclinganjones@gmail.com>
Sent: Wednesday, July 12, 2023 11:14 AM
To: pemc kantara <Wg-pemc@kantarainitiative.org>
Subject: [WG-PEMC] use of biometrics

TSA's biometric tests are getting attention, but it seems like the questions being asked are wrong. There has been biometric testing of all airline travelers since 9/11. The question is where is biometric data collected and retained. It seems that public cameras are becoming ubiquitous and the storage duration varies widely. Given this, what is there really to control now?

A senator had trouble saying no to TSA's voluntary facial recogntion - The Washington Post

..tom