SBS9828X,next time you see a long and grey aircraft with 4 big
big P&W engines and a boom behind,then it is a KC-135.

Note: The boom is the a thing that looks like a "stick" at the back
of the aircraft.The boom operator,affectionely known as the
boomer,lies down and does the aerial refueling operation.
RSAF also has Refueling Drouges for the F-5s and (formely)
A4s.
SBST275,I thought that it was a F-15T that esort the KC-135?
Got a photo of it at Sheares
bridge.But it was too blur.