[Llarry]

The U.S. Dept of Defense plans to get rid of all Boeing 707-based aircraft:
-- The Air Force E-3 AWACS to be replaced by the Boeing 737-based E-7 Wedgetail (see photo for Korean version.) The stated goal is procurement of 26 aircraft. Note that there is a NATO squadron of 14 E-3s; one might presume they will follow the US lead on this but perhaps not. Saudi Arabia also flies the E-3 and has KE-3 tankers.
-- The Navy E-6 Mercury to be replaced by C-130J-based aircraft; instead of being based in Oklahoma, the Navy plans two squadrons, one on each coast. (What is old is new again; a photo of the EC-130 was posted earlier.)