When World War I broke out in 1914, President Woodrow Wilson proclaimed the United States would remain neutral. The U.S.A. only officially entered the conflict three years later. It took the Japanese bombing of Pearl Harbour in 1941 to bring America into the Second World War. But why was America reluctant to enter both wars earlier? How did its involvement change the course of both wars? Rob Weinberg asks the big questions to Dr. Mitch Goodrum at Canterbury Christ Church University.