Thanks for your very helpful reply as an \"old\" A-10 insider, Dice-man!
Please let me post a downsized version of the guy wearing a current LM T-Shirt with the inscription Lockheed Martin HOG UP FIELD TEAM.
(I like this Warthog riding an A-10)
In his remarkable photo book \"The Modern Hog Guide - The A-10 Warthog Exposed\", Reid Air Publications, 2007, Jake Melampy wrote: \"A Service Life Extension Program (SLEP) was begun in 2002. Known as \"Hog Up\", it will keep the A-10 flying until 2028. The jet's original lifespan of 6000 to 8000 flight hours has been extended to roughly 16,000 hours. With the help of retired A-10s in storage at AMARG in Tucson, Arizona, the A-10s in service are receiving new, rebuilt wings. Wings are pulled from the jets in storage, refurbished, then reinstalled on the remaining A-10s in service. Simultaneously, the jet receives new fuel bladders and an exhaustive inspection for corrosion with treatment undertaken where neccessary.
Over the holidays, I will also take a closer look to identify at least some of these AMARG A-10s, pictured on the following downsized USAF shot (Hi-res version already linked by Dice-man)
BTW: At least to me, this very interesting AMARG shot again remembers the A-10's old glory in Europe - an aircraft designed to kill Warshaw Pact tanks in case of a potential WW III.