>>4404202 (lb)

Former RivetJoint Fag here…

It’s an RC-135 doing check-out flights. In the area of E-Systems who updates/calibrates all the onboard elint/comint/sigint systems on board.

Read up…

http://www.airforcemag.com/MagazineArchive/Pages/1992/February%201992/0292ears.aspx