SDSR page 28
"withdraw the Sentinel airborne ground surveillance aircraft once it is no longer required to support operations in Afghanistan."
Don't understand this one at all.
Nurse
Will Sentry's be providing the airframes for the rivet joints?
Almost certainly not - the Sentry is a 707 derivative (C-137 series) - rather than Rivet Joint which is a KC-135 derivative, based on the original Boeing 367-80 prototype with it's narrower fuselage.
S41