Spontaneous symmetry breaking in this interaction rotates a vector boson to a photonic field in a phenomenon parameterized by this interaction’s namesake mixing angle. The quanta of this interaction were first observed by the UA1 and UA2 experiments at CERN. Gamma ray and electron emission data were analyzed by Chien-Shiung (*) Wu’s (10[1])team (10[2])to prove that this (10[1])interaction does not conserve (10[1])parity. The (10[1])CKM matrix describes flavor oscillations of quarks mediated by this interaction. The W and Z bosons mediate this interaction which Glashow, (10[1])Weinberg, and Salam unified with electromagnetism. Beta decay (10[1])is explained by, for 10 points, what fundamental force, which, despite its name, is not the least powerful? ■END■