If you would like to use the USAF and/or DoD logo, there is a public request process to use those logos.
Please see the "Public Request or Merchandise Licensing" sections of the Intellectual Property Management page for details: https://www.trademark.af.mil/Licensing/Applications.aspx.
You can apply for a license here: https://www.trademark.af.mil/Licensing/Applications/Apply-for-a-License/