Sean Spicer, Donald Trump’s first White House press secretary and a Harvard politics fellow, came under fire on Wednesday for a tweet in which he appeared to confuse one major second world war anniversary for another. Spicer wrote: “Today is Dday [sic]. It only lives in infamy if we remember and share the story of sacrifice with the next generation. #DDay.” 7 December is indeed an important second world war anniversary – that of the Japanese attack on Pearl Harbor, Hawaii, which brought the US into the war. Pearl Harbor has been called many things, including most famously “a date...