Editing Permissive action link (section)

=== Stronglinks and weaklinks ===
[[File:Permissive Action Link Schematic Composite en.png|thumbnail|right|Simplified illustration of some nuclear weapon safety mechanisms]]
Another part of the PAL design is the inclusion of [[Strong link weak link|"stronglinks" and "weaklinks"]]. These ensure resilience to accidental activation through damage. The stronglinks include an increased ruggedness of some components and the inclusion of [[insensitive munitions]] so that they will not be circumvented by fire, vibration, or magnetic fields, leaving the PAL vulnerable to bypass after such damage. Also, activation-critical electronics within the weapon, such as capacitors, are selected so that they will fail before the safety device in the event of damage, ensuring that the weapon [[failsafe|fails safe]].<ref>David W. Plummer, William H. Greenwood: ''History of Nuclear Weapon Safety Devices''. Sandia National Laboratories, Albuquerque 1998. Presented at the 34th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, Cleveland, July 1998. ([http://www.osti.gov/bridge/servlets/purl/671923-JYRvMV/webviewable/671923.pdf PDF; 1,3&nbsp;MB] {{Webarchive|url=https://web.archive.org/web/20220617075838/http://www.osti.gov/bridge/purl.cover.jsp?p%2F671923-JYRvMV%2Fwebviewable%2F671923.pdf |date=June 17, 2022 }}, accessed September 23, 2010).</ref>