Where “Impossible Whopper launch” started

Burger King, on Retail, Apr 1, 2019. It reached 3 platforms in 10 months.

LineageContestedKey steps, 9 of 15. Lines follow time and platform
Burger KingFirst postSt. Louis MagazinePressLos Angeles TimesPressOwner responseOwner responseBacklashCommercialMilestoneBacklashPatient zero