Video blog -- Military & Aerospace Electronics Chief Editor John Keller discusses the potentially lucrative military contracting opportunities in the 2012 Pentagon budget proposal for systems upgrades and technology insertion to existing military systems, as an alternative to buying new platforms.For more on the 2012 DOD budget see also:Video: Military & Aerospace Electronics editor gives his take on the 2012 DOD budget request;Pentagon proposes 10-percent cut in spending for electronics and communications in 2012 budget;Cuts in 2012 DOD budget request reflect winding down of overseas military operations; RDT&E sees another hit.