He said Guard members are also getting training on how to identify potential insider threats. Multiple officials said the process began as the first Guard troops began deploying to D.C. more than a week ago. That could include involvement in prior investigations or terrorism-related concerns, said David Gomez, a former FBI national security supervisor in Seattle. Gen. Daniel R. Hokanson, chief of the National Guard Bureau, has been meeting with Guard troops as they arrive in D.C. and as they gather downtown. Behind them were dozens more National Guard officers and staff, with their eyes trained on additional maps and charts displayed on the wall.