This event represents Chad's diplomatic retaliation to US policy, not a US constitutional event. A-score is negligible (0.09) because: (1) This is a foreign government's action affecting US citizens abroad, not domestic constitutional damage; (2) Rule_of_law driver scores minimal 1 only for potential reciprocal policy implications; (3) Mechanism modifier 0.3 reflects this is foreign policy response, not constitutional mechanism; (4) Scope modifier 0.4 reflects international context with no direct US institutional impact; (5) No election interference, separation of powers issues, civil rights violations within US jurisdiction, or institutional capture. B-score is moderate (22.62) driven by novelty of tit-for-tat retaliation, media interest in international blowback narrative, and timing relevance to Trump travel ban controversy. However, this clearly qualifies as Noise: it's a foreign policy consequence story with zero domestic constitutional mechanism, affects narrow population of US travelers to Chad, and represents diplomatic theater rather than constitutional damage.