This reminds me of a story about a TOR developer who suspected her keyboard from Amazon was intercepted and implanted, because the redirection was included in the delivery log. Seems quite likely it was, in light of Glenn's latest slides release.
The Dulles area is known as a hub for US spook-agency headquarters and activities.
It's not obvious tho that this is suspicious - there's also a big airport there and it could be just a shipping facility. I guess the argument is that it is an unnecessary detour if it could have gone right to Alexandria.
I'd like to see (a) other CA shipments, say non-computer items, to Alexandria - and whether they go via Dulles and (b) a followup indicating whether Shepard found anything of interest.