Two definitions of weapon systems “concurrency” December 25, 2020 Eric Lofgren 0 Because of the uncertainties and perceived criticality of ICBMs, the WDD and Ramo-Wooldridge believed it unwise to rely on only one approach. If it did […] Share this: Click to print (Opens in new window) Print Click to share on Facebook (Opens in new window) Facebook Click to share on LinkedIn (Opens in new window) LinkedIn Click to share on Reddit (Opens in new window) Reddit Click to share on X (Opens in new window) X