Don't know if we figured out D5 yet, but this could be a clue?:
Ambassador talking about 3D approach:
"3D approach, emphasizing diplomacy, development, and defense…"
Then Maj. Gen. Hicks, flips it:
"As the ambassador said, we also believe in the D3 approach"….
Ambassador also noted this:
"Just yesterday a congressional delegation left Niamey for onward travel within Africa, but this was a group of five U.S. senators and their staff. We’ve had several congressional and staff delegations come already this calendar year; they very much want to know what’s going on in Niger, including not just our diplomacy and development but our defense relationship.
HMMM….wonder who those Senators might be??
https://www.state.gov/r/pa/ime/africamediahub/rls/280263.htm