Alfred Mamba remembers the frenzy that gripped the soccer stadium in Zaire, now known as Congo, as the fierce heavyweight title bout unfolded through eight rounds between the underdog Muhammad Ali and the seemingly invincible George Foreman. “It was a big party,” Mamba said as he recalled his father, one of the co-founders of the boxing federation in Congo, taking him to the fight as a 15-year-old. As Mamba flipped through a pile of photos he said were taken at the fight, he remembered the stadium erupting as Ali and Foreman stepped out for the much-anticipated “ Rumble in the Jungle ” as the contest was famously known.