Editing Insensitive munition (section)

===Origin===
Following the [[1966 Palomares B-52 crash]] and the [[1968 Thule Air Base B-52 crash]], concerns were raised by accident investigators about the [[high explosive]] used in the [[nuclear device]]s, which had detonated on impact. Efforts were started to find an explosive that was [[chemical stability|stable]] enough to withstand the forces involved in an aircraft accident.<ref>{{cite book|url=https://books.google.com/books?id=zIXkp-SSehcC|title=Explosive Effects and Applications|first1=Jonas A. |last1=Zukas |first2=William P. |last2=Walters |pages=305–307|isbn=978-0-387-95558-2|publisher=Springer|year=2002}}</ref>  The [[Lawrence Livermore National Laboratory]] developed the "[[Explosives safety#Susan Test|Susan Test]]" – a standard test designed to simulate an aircraft accident by squeezing and nipping explosive material between metal surfaces of a test projectile. Following experiments with this device, the [[Los Alamos National Laboratory]] developed a new safer type of explosive, called insensitive high explosive (IHE), for use in U.S. nuclear weapons.<ref>{{cite book|url=https://books.google.com/books?id=3iOg-t-3q1sC|title=No end in sight|first=Nathan E. |last=Busch|pages=50–51|isbn=978-0-8131-2323-3|publisher=University Press of Kentucky|year=2004|access-date=2021-01-25|archive-date=2017-09-27|archive-url=https://web.archive.org/web/20170927171926/https://books.google.com/books?id=3iOg-t-3q1sC|url-status=live}}</ref>

IHE explosives can withstand impacts up to {{convert|1500|ft/s|m/s}}, as opposed to conventional HE, which will detonate at only {{convert|100|ft/s|m/s}}.<ref>{{cite book|url=https://books.google.com/books?id=ehNSmE0AJgAC|title=Nuclear weapons, scientists, and the post-Cold War challenge|first=Sidney David |last=Drell|pages=147–150|isbn=978-981-256-896-0|publisher=World Scientific|year=2007}}</ref>