*Identification, friend or foe (IFF) is a radar-based identification system designed for command and control. It uses a transponder that listens for an interrogation signal and then sends a response that identifies the broadcaster. It enables military and civilian air traffic control interrogation systems to identify aircraft, vehicles, or forces as friendly and to determine their bearing and range from the interrogator. IFF may be used by both military and civilian aircraft. IFF was first developed during World War II, with the arrival of radar, and several friendly fire incidents. (Radar Energy Warfare and the Challenges of Stealth Technology, Bahman Zohuri, 2020)

*The subject of If This is a Man is not how could men do such things, but what was it that they did, how did it fall to some prisoners (‘the saved’) to endure it and others (‘the drowned’) not to, what is left when everything but the barest capacity to endure, the power only ‘to refuse our consent’, is driven out, and by what means are some still able to impress on others the suggestion of a world ‘not corrupt, not savage, extraneous to hatred and terror… a remote possibility of good’. (Primo Levi)

*Would we relay an actual EAM (Emergency Action Message) —one that directed us to order a nuclear strike—if we received one? (https://www.theatlantic.com/international/archive/2018/01/the-lasting-psychological-stress-of-nuclear-deterrence/550280/)